* Package:    dev-python/xarray-0.16.2
 * Repository: gentoo
 * Maintainer: python@gentoo.org
 * Upstream:   xarray@googlegroups.com
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux python_targets_python3_6 python_targets_python3_7 python_targets_python3_8 python_targets_python3_9 test userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox test userpriv usersandbox


@@@@@ PLEASE PAY ATTENTION HERE!!! @@@@@
This information may help you to understand if this is a duplicate or if this bug exists after you pushed a fix;
This ebuild was merged at the following commit:
https://github.com/gentoo/gentoo/commit/6038ab5dc26e448b450d5080e343f71d9686f9b7  (Mon Dec 14 08:09:43 UTC 2020)
@@@@@ END @@@@@



emerge --info:
Portage 3.0.12 (python 3.7.9-final-0, default/linux/amd64/17.1, gcc-10.2.0, glibc-2.32-r5, 4.19.102-gentoo x86_64)
=================================================================
System uname: Linux-4.19.102-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E5-2650_v4_@_2.20GHz-with-gentoo-2.7
KiB Mem:   264031048 total, 236784164 free
KiB Swap:          0 total,         0 free
sh bash 5.0_p18
ld GNU ld (Gentoo 2.35.1 p2) 2.35.1
app-shells/bash:          5.0_p18::gentoo
dev-lang/perl:            5.30.3-r1::gentoo
dev-lang/python:          2.7.18-r4::gentoo, 3.6.12::gentoo, 3.7.9::gentoo, 3.8.6::gentoo, 3.9.0::gentoo
dev-util/cmake:           3.19.1-r1::gentoo
sys-apps/baselayout:      2.7-r1::gentoo
sys-apps/openrc:          0.42.1::gentoo
sys-apps/sandbox:         2.20::gentoo
sys-devel/autoconf:       2.13-r1::gentoo, 2.69-r5::gentoo
sys-devel/automake:       1.16.3-r1::gentoo
sys-devel/binutils:       2.35.1-r1::gentoo
sys-devel/gcc:            10.2.0-r3::gentoo
sys-devel/gcc-config:     2.3.2-r1::gentoo
sys-devel/libtool:        2.4.6-r6::gentoo
sys-devel/make:           4.3::gentoo
sys-kernel/linux-headers: 5.10::gentoo (virtual/os-headers)
sys-libs/glibc:           2.32-r5::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    sync-rsync-verify-metamanifest: yes
    sync-rsync-verify-jobs: 1
    sync-rsync-verify-max-age: 24
    sync-rsync-extra-opts: 

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* Apache-2.0"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -march=x86-64 -frecord-gcc-switches"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -march=x86-64 -frecord-gcc-switches"
DISTDIR="/var/tmp/portage/dev-python/xarray-0.16.2/distdir"
EMERGE_DEFAULT_OPTS="--with-bdeps=y -1 -k -b"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR"
FCFLAGS="-O2 -pipe -march=x86-64 -frecord-gcc-switches"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms sign split-log strict test unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe -march=x86-64 -frecord-gcc-switches"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--defsym=__gentoo_check_ldflags__=0"
MAKEOPTS="-j48 V=1"
PKGDIR="/root/.packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
USE="acl amd64 berkdb bzip2 cli crypt dri elogind fortran gdbm iconv ipv6 jumbo-build libglvnd libtirpc multilib native-symlinks ncurses nls nptl openmp pam pcre readline seccomp split-usr ssl tcpd test unicode xattr zlib" ABI_X86="64" ELIBC="glibc" KERNEL="linux" PYTHON_TARGETS="python3_6 python3_7 python3_8 python3_9" USERLAND="GNU"
Unset:  CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS





emerge history:
2020-12-14T09:31:36 >>> virtual/fortran
2020-12-14T09:31:35 >>> dev-lang/swig
2020-12-14T09:31:37 >>> dev-cpp/eigen
2020-12-14T09:31:38 >>> dev-python/olefile
2020-12-14T09:31:38 >>> dev-python/pytz
2020-12-14T09:31:38 >>> dev-python/cython
2020-12-14T09:31:55 >>> sci-libs/lapack
2020-12-14T09:32:05 >>> dev-python/pillow
2020-12-14T09:31:39 >>> dev-python/python-dateutil
2020-12-14T09:32:22 >>> virtual/cblas
2020-12-14T09:32:22 >>> virtual/lapack
2020-12-14T09:32:23 >>> virtual/blas
2020-12-14T09:32:45 >>> sci-libs/arpack
2020-12-14T09:32:02 >>> dev-python/pybind11
2020-12-14T09:32:42 >>> dev-python/numpy
2020-12-14T09:46:49 >>> dev-python/numexpr
2020-12-14T09:46:49 >>> dev-python/scipy
2020-12-14T09:47:14 >>> dev-python/bottleneck
2020-12-14T09:47:21 >>> dev-python/pandas
2020-12-14T09:47:49 >>> dev-python/xarray
2020-12-14T09:48:38 >>> media-fonts/stix-fonts
2020-12-14T09:48:39 >>> media-libs/freetype
2020-12-14T09:48:36 >>> media-fonts/dejavu
2020-12-14T09:48:39 >>> media-libs/libpng
2020-12-14T09:48:40 >>> media-libs/libjpeg-turbo
2020-12-14T09:48:40 >>> media-libs/qhull
2020-12-14T09:48:41 >>> dev-python/pypy3
2020-12-14T09:50:29 >>> dev-python/dataclasses
2020-12-14T09:50:30 >>> dev-python/appdirs
2020-12-14T09:50:29 >>> virtual/jpeg
2020-12-14T09:50:30 >>> dev-python/toml
2020-12-14T09:50:32 >>> dev-python/typing-extensions
2020-12-14T09:50:31 >>> dev-python/pyparsing
2020-12-14T09:50:32 >>> dev-python/click
2020-12-14T09:50:34 >>> dev-python/iniconfig
2020-12-14T09:50:33 >>> dev-python/toolz
2020-12-14T09:50:35 >>> dev-python/py
2020-12-14T09:50:34 >>> dev-python/more-itertools
2020-12-14T09:50:36 >>> dev-python/cycler
2020-12-14T09:50:36 >>> dev-python/cppy
2020-12-14T09:50:37 >>> dev-python/sortedcontainers
2020-12-14T09:50:39 >>> dev-python/pathspec
2020-12-14T09:50:38 >>> dev-python/regex
2020-12-14T09:50:38 >>> dev-python/typed-ast
2020-12-14T09:50:40 >>> dev-python/mypy_extensions
2020-12-14T09:50:40 >>> dev-python/versioneer
2020-12-14T09:50:42 >>> dev-lang/nasm
2020-12-14T09:50:41 >>> dev-python/namespace-zope
2020-12-14T09:51:24 >>> dev-python/zipp
2020-12-14T09:51:31 >>> dev-python/packaging
2020-12-14T09:51:57 >>> dev-python/kiwisolver
2020-12-14T09:52:16 >>> dev-python/black
2020-12-14T09:52:26 >>> dev-python/zope-interface
2020-12-14T09:52:39 >>> dev-python/importlib_metadata
2020-12-14T09:52:54 >>> dev-python/attrs
2020-12-14T09:53:02 >>> dev-python/pluggy
2020-12-14T09:53:06 >>> dev-python/hypothesis
2020-12-14T09:53:13 >>> dev-python/pytest
2020-12-14T09:52:23 >>> dev-python/pillow
2020-12-14T09:54:45 >>> dev-python/matplotlib


>>> Unpacking source...
>>> Unpacking xarray-0.16.2.tar.gz to /var/tmp/portage/dev-python/xarray-0.16.2/work
>>> Source unpacked in /var/tmp/portage/dev-python/xarray-0.16.2/work
>>> Preparing source in /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2 ...
 * python3_6: running distutils-r1_run_phase distutils-r1_python_compile
python3.6 setup.py build -j 48
running build
running build_py
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray
copying xarray/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray
copying xarray/conventions.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray
copying xarray/convert.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray
copying xarray/testing.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray
copying xarray/tutorial.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray
copying xarray/ufuncs.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/api.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/apiv2.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/cfgrib_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/common.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/file_manager.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/h5netcdf_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/locks.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/lru_cache.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/memory.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/netCDF4_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/netcdf3.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/plugins.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/pseudonetcdf_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/pydap_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/pynio_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/rasterio_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/scipy_.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
copying xarray/backends/zarr.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/backends
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
copying xarray/coding/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
copying xarray/coding/cftime_offsets.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
copying xarray/coding/cftimeindex.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
copying xarray/coding/frequencies.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
copying xarray/coding/strings.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
copying xarray/coding/times.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
copying xarray/coding/variables.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/coding
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/accessor_dt.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/accessor_str.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/alignment.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/arithmetic.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/combine.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/common.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/computation.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/concat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/coordinates.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/dask_array_compat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/dask_array_ops.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/dataarray.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/dataset.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/dtypes.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/duck_array_ops.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/extensions.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/formatting.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/formatting_html.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/groupby.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/indexes.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/indexing.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/merge.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/missing.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/nanops.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/npcompat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/nputils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/ops.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/options.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/parallel.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/pdcompat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/pycompat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/resample.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/resample_cftime.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/rolling.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/rolling_exp.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/utils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/variable.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
copying xarray/core/weighted.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/core
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/plot
copying xarray/plot/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/plot
copying xarray/plot/dataset_plot.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/plot
copying xarray/plot/facetgrid.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/plot
copying xarray/plot/plot.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/plot
copying xarray/plot/utils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/plot
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/tests
copying xarray/tests/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/tests
copying xarray/tests/test_accessor_dt.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/tests
copying xarray/tests/test_accessor_str.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_6/lib/xarray/tests
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copying xarray/core/npcompat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/nputils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/ops.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/options.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/parallel.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/pdcompat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/pycompat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/resample.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/resample_cftime.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/rolling.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/rolling_exp.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/utils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/variable.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
copying xarray/core/weighted.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/core
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/plot
copying xarray/plot/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/plot
copying xarray/plot/dataset_plot.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/plot
copying xarray/plot/facetgrid.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/plot
copying xarray/plot/plot.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/plot
copying xarray/plot/utils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/plot
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_accessor_dt.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_accessor_str.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_backends.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_backends_api.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_backends_common.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_backends_file_manager.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_backends_locks.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_backends_lru_cache.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_cftime_offsets.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_cftimeindex.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_cftimeindex_resample.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_coding.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_coding_strings.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_coding_times.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_combine.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_computation.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_concat.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_conventions.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_cupy.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_dask.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_dataarray.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_dataset.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_distributed.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_dtypes.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_duck_array_ops.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_extensions.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_formatting.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_formatting_html.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_groupby.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_indexing.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_interp.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_merge.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_missing.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_nputils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_options.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_plot.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_print_versions.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_sparse.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_testing.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_tutorial.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_ufuncs.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_units.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_utils.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_variable.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
copying xarray/tests/test_weighted.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/util
copying xarray/util/__init__.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/util
copying xarray/util/print_versions.py -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/util
running egg_info
writing xarray.egg-info/PKG-INFO
writing dependency_links to xarray.egg-info/dependency_links.txt
writing requirements to xarray.egg-info/requires.txt
writing top-level names to xarray.egg-info/top_level.txt
reading manifest file 'xarray.egg-info/SOURCES.txt'
writing manifest file 'xarray.egg-info/SOURCES.txt'
copying xarray/py.typed -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/static
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/static/css
copying xarray/static/css/style.css -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/static/css
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/static/html
copying xarray/static/html/icons-svg-inline.html -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/static/html
creating /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests/data
copying xarray/tests/data/bears.nc -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests/data
copying xarray/tests/data/example.grib -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests/data
copying xarray/tests/data/example.ict -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests/data
copying xarray/tests/data/example.uamiv -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests/data
copying xarray/tests/data/example_1.nc -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests/data
copying xarray/tests/data/example_1.nc.gz -> /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2-python3_9/lib/xarray/tests/data
warning: build_py: byte-compiling is disabled, skipping.

>>> Source compiled.
>>> Test phase: dev-python/xarray-0.16.2
 * python3_6: running distutils-r1_run_phase python_test
============================= test session starts ==============================
platform linux -- Python 3.6.12, pytest-6.2.0, py-1.10.0, pluggy-0.13.1 -- /usr/bin/python3.6
cachedir: .pytest_cache
hypothesis profile 'default' -> database=DirectoryBasedExampleDatabase('/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/.hypothesis/examples')
rootdir: /var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2, configfile: setup.cfg, testpaths: xarray/tests, properties
plugins: hypothesis-5.43.3
collecting ... collected 0 items / 47 errors

==================================== ERRORS ====================================
______________ ERROR collecting xarray/tests/test_accessor_dt.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_accessor_dt.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting xarray/tests/test_accessor_str.py ______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_accessor_str.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_backends.py ________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_backends.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting xarray/tests/test_backends_api.py ______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_backends_api.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
____________ ERROR collecting xarray/tests/test_backends_common.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_backends_common.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________ ERROR collecting xarray/tests/test_backends_file_manager.py __________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_backends_file_manager.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_____________ ERROR collecting xarray/tests/test_backends_locks.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_backends_locks.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
___________ ERROR collecting xarray/tests/test_backends_lru_cache.py ___________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_backends_lru_cache.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_____________ ERROR collecting xarray/tests/test_cftime_offsets.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_cftime_offsets.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting xarray/tests/test_cftimeindex.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_cftimeindex.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
__________ ERROR collecting xarray/tests/test_cftimeindex_resample.py __________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_cftimeindex_resample.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_coding.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_coding.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_____________ ERROR collecting xarray/tests/test_coding_strings.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_coding_strings.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting xarray/tests/test_coding_times.py ______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_coding_times.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_combine.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_combine.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting xarray/tests/test_computation.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_computation.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_concat.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_concat.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting xarray/tests/test_conventions.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_conventions.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
__________________ ERROR collecting xarray/tests/test_cupy.py __________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_cupy.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
__________________ ERROR collecting xarray/tests/test_dask.py __________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_dask.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_______________ ERROR collecting xarray/tests/test_dataarray.py ________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_dataarray.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_dataset.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_dataset.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting xarray/tests/test_distributed.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_distributed.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_dtypes.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_dtypes.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_____________ ERROR collecting xarray/tests/test_duck_array_ops.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_duck_array_ops.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_______________ ERROR collecting xarray/tests/test_extensions.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_extensions.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_______________ ERROR collecting xarray/tests/test_formatting.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_formatting.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
____________ ERROR collecting xarray/tests/test_formatting_html.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_formatting_html.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_groupby.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_groupby.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_indexing.py ________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_indexing.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_interp.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_interp.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_merge.py __________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_merge.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_missing.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_missing.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_nputils.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_nputils.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_options.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_options.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
__________________ ERROR collecting xarray/tests/test_plot.py __________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_plot.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_____________ ERROR collecting xarray/tests/test_print_versions.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_print_versions.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_sparse.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_sparse.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_testing.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_testing.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_tutorial.py ________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_tutorial.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_ufuncs.py _________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_ufuncs.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_units.py __________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_units.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_________________ ERROR collecting xarray/tests/test_utils.py __________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_utils.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_variable.py ________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_variable.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
________________ ERROR collecting xarray/tests/test_weighted.py ________________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/xarray/tests/test_weighted.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:941: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:678: in exec_module
    ???
<frozen importlib._bootstrap>:219: in _call_with_frames_removed
    ???
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
______________ ERROR collecting properties/test_encode_decode.py _______________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/properties/test_encode_decode.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
/usr/lib64/python3.6/site-packages/_pytest/assertion/rewrite.py:170: in exec_module
    exec(co, module.__dict__)
properties/test_encode_decode.py:15: in <module>
    import xarray as xr
xarray/__init__.py:3: in <module>
    from . import testing, tutorial, ufuncs
xarray/testing.py:6: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
_____________ ERROR collecting properties/test_pandas_roundtrip.py _____________
ImportError while importing test module '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2/properties/test_pandas_roundtrip.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.6/site-packages/pandas/__init__.py:30: in <module>
    from pandas._libs import hashtable as _hashtable, lib as _lib, tslib as _tslib
/usr/lib64/python3.6/site-packages/pandas/_libs/__init__.py:13: in <module>
    from pandas._libs.interval import Interval
pandas/_libs/interval.pyx:1: in init pandas._libs.interval
    ???
pandas/_libs/hashtable.pyx:1: in init pandas._libs.hashtable
    ???
pandas/_libs/missing.pyx:1: in init pandas._libs.missing
    ???
/usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/__init__.py:30: in <module>
    from .conversion import OutOfBoundsTimedelta, localize_pydatetime
pandas/_libs/tslibs/conversion.pyx:1: in init pandas._libs.tslibs.conversion
    ???
pandas/_libs/tslibs/nattype.pyx:1: in init pandas._libs.tslibs.nattype
    ???
E   ImportError: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table

The above exception was the direct cause of the following exception:
/usr/lib64/python3.6/site-packages/_pytest/python.py:578: in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
/usr/lib64/python3.6/site-packages/_pytest/pathlib.py:531: in import_path
    importlib.import_module(module_name)
/usr/lib64/python3.6/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:994: in _gcd_import
    ???
<frozen importlib._bootstrap>:971: in _find_and_load
    ???
<frozen importlib._bootstrap>:955: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:665: in _load_unlocked
    ???
/usr/lib64/python3.6/site-packages/_pytest/assertion/rewrite.py:170: in exec_module
    exec(co, module.__dict__)
properties/test_pandas_roundtrip.py:7: in <module>
    import pandas as pd
/usr/lib64/python3.6/site-packages/pandas/__init__.py:38: in <module>
    ) from e
E   ImportError: C extension: /usr/lib64/python3.6/site-packages/pandas/_libs/tslibs/np_datetime.cpython-36m-x86_64-linux-gnu.so: undefined symbol: days_per_month_table not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
=========================== short test summary info ============================
ERROR xarray/tests/test_accessor_dt.py
ERROR xarray/tests/test_accessor_str.py
ERROR xarray/tests/test_backends.py
ERROR xarray/tests/test_backends_api.py
ERROR xarray/tests/test_backends_common.py
ERROR xarray/tests/test_backends_file_manager.py
ERROR xarray/tests/test_backends_locks.py
ERROR xarray/tests/test_backends_lru_cache.py
ERROR xarray/tests/test_cftime_offsets.py
ERROR xarray/tests/test_cftimeindex.py
ERROR xarray/tests/test_cftimeindex_resample.py
ERROR xarray/tests/test_coding.py
ERROR xarray/tests/test_coding_strings.py
ERROR xarray/tests/test_coding_times.py
ERROR xarray/tests/test_combine.py
ERROR xarray/tests/test_computation.py
ERROR xarray/tests/test_concat.py
ERROR xarray/tests/test_conventions.py
ERROR xarray/tests/test_cupy.py
ERROR xarray/tests/test_dask.py
ERROR xarray/tests/test_dataarray.py
ERROR xarray/tests/test_dataset.py
ERROR xarray/tests/test_distributed.py
ERROR xarray/tests/test_dtypes.py
ERROR xarray/tests/test_duck_array_ops.py
ERROR xarray/tests/test_extensions.py
ERROR xarray/tests/test_formatting.py
ERROR xarray/tests/test_formatting_html.py
ERROR xarray/tests/test_groupby.py
ERROR xarray/tests/test_indexing.py
ERROR xarray/tests/test_interp.py
ERROR xarray/tests/test_merge.py
ERROR xarray/tests/test_missing.py
ERROR xarray/tests/test_nputils.py
ERROR xarray/tests/test_options.py
ERROR xarray/tests/test_plot.py
ERROR xarray/tests/test_print_versions.py
ERROR xarray/tests/test_sparse.py
ERROR xarray/tests/test_testing.py
ERROR xarray/tests/test_tutorial.py
ERROR xarray/tests/test_ufuncs.py
ERROR xarray/tests/test_units.py
ERROR xarray/tests/test_utils.py
ERROR xarray/tests/test_variable.py
ERROR xarray/tests/test_weighted.py
ERROR properties/test_encode_decode.py
ERROR properties/test_pandas_roundtrip.py
!!!!!!!!!!!!!!!!!!! Interrupted: 47 errors during collection !!!!!!!!!!!!!!!!!!!
============================== 47 errors in 4.75s ==============================
 * ERROR: dev-python/xarray-0.16.2::gentoo failed (test phase):
 *   Tests fail with python3.6
 * 
 * Call stack:
 *     ebuild.sh, line  125:  Called src_test
 *   environment, line 3081:  Called distutils-r1_src_test
 *   environment, line 1282:  Called _distutils-r1_run_foreach_impl 'python_test'
 *   environment, line  498:  Called python_foreach_impl 'distutils-r1_run_phase' 'python_test'
 *   environment, line 2690:  Called multibuild_foreach_variant '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'python_test'
 *   environment, line 2122:  Called _multibuild_run '_python_multibuild_wrapper' 'distutils-r1_run_phase' 'python_test'
 *   environment, line 2120:  Called _python_multibuild_wrapper 'distutils-r1_run_phase' 'python_test'
 *   environment, line  855:  Called distutils-r1_run_phase 'python_test'
 *   environment, line 1219:  Called python_test
 *   environment, line 3041:  Called die
 * The specific snippet of code:
 *       pytest -vv || die "Tests fail with ${EPYTHON}"
 * 
 * If you need support, post the output of `emerge --info '=dev-python/xarray-0.16.2::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-python/xarray-0.16.2::gentoo'`.
 * The complete build log is located at '/var/log/emerge-log/build/dev-python/xarray-0.16.2:20201214-085500.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-python/xarray-0.16.2/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-python/xarray-0.16.2/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2'
 * S: '/var/tmp/portage/dev-python/xarray-0.16.2/work/xarray-0.16.2'