These are the packages that would be merged, in order:

Calculating dependencies  .... done!


[nomerge       ] dev-python/setuptools-40.0.0::gentoo [36.7.2::gentoo] USE="{test*}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[nomerge       ]  dev-python/wheel-0.31.1::gentoo  USE="-doc {-test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[nomerge       ]   dev-python/jsonschema-2.6.0::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[nomerge       ]    dev-python/webcolors-1.5::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[nomerge       ]     dev-python/nose-1.3.7-r3::gentoo  USE="{test} -doc -examples" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[ebuild  N     ]      dev-python/twisted-18.4.0::gentoo  USE="crypt soap {test} -conch -http2 -serial" PYTHON_TARGETS="python2_7 python3_5 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]       dev-python/automat-0.7.0::gentoo  USE="{test} -examples" PYTHON_TARGETS="python2_7 python3_5 -pypy -python3_4 -python3_6" 0 KiB
[ebuild  N     ]        dev-python/m2r-0.1.14::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -python3_4 -python3_6" 0 KiB
[ebuild  N     ]         dev-python/mistune-0.7.4::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]          dev-python/cython-0.28.2::gentoo  USE="{test} -doc -emacs" PYTHON_TARGETS="python2_7 python3_5 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]           dev-python/numpy-1.13.3::gentoo  USE="{test} -doc -lapack" PYTHON_TARGETS="python2_7 python3_5 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]       dev-python/service_identity-17.0.0-r1::gentoo  USE="{test} -doc" PYTHON_TARGETS="python2_7 python3_5 -pypy -python3_4 -python3_6" 0 KiB
[ebuild  N     ]        dev-python/attrs-18.1.0::gentoo  USE="{-test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]         dev-python/zope-interface-4.5.0::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]          dev-python/zope-event-4.3.0::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]  dev-python/wheel-0.31.1::gentoo  USE="-doc {-test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]   dev-python/jsonschema-2.6.0::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]    dev-python/webcolors-1.5::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]     dev-python/nose-1.3.7-r3::gentoo  USE="{test} -doc -examples" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]  dev-python/pytest-virtualenv-1.2.11::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]   dev-python/virtualenv-16.0.0::gentoo  USE="{test} -doc" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]   dev-python/pytest-shutil-1.2.11::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]  dev-python/backports-unittest-mock-1.4::gentoo  USE="{test} -doc" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 6 KiB
[ebuild  N     ]   dev-python/mock-2.0.0::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[nomerge       ] dev-python/service_identity-17.0.0-r1::gentoo  USE="{test} -doc" PYTHON_TARGETS="python2_7 python3_5 -pypy -python3_4 -python3_6" 
[ebuild  N     ]  dev-python/pyasn1-modules-0.2.1::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[nomerge       ] dev-python/twisted-18.4.0::gentoo  USE="crypt soap {test} -conch -http2 -serial" PYTHON_TARGETS="python2_7 python3_5 -python3_4 -python3_6" 
[ebuild  N     ]  dev-python/soappy-0.12.22::gentoo  USE="ssl -examples" PYTHON_TARGETS="python2_7" 0 KiB
[ebuild  N     ]   dev-python/wstools-0.4.5-r1::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -python3_4 -python3_6" 0 KiB
[ebuild  N     ]  dev-python/hyperlink-18.0.0::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -python3_4 -python3_6" 0 KiB
[nomerge       ] dev-python/pytest-shutil-1.2.11::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[ebuild  N     ]  dev-python/execnet-1.5.0::gentoo  USE="-doc {-test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]   dev-python/apipkg-1.4::gentoo  USE="{test} -examples" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]    dev-python/hgdistver-0.25::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]  dev-python/path-py-11.0.1::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[nomerge       ] dev-python/pytest-virtualenv-1.2.11::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[ebuild  N     ]  dev-python/pytest-fixture-config-1.2.11::gentoo  USE="{test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[ebuild  N     ]   dev-python/pytest-3.4.2::gentoo  USE="-doc {-test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB
[nomerge       ] dev-python/sphinx-1.6.5::gentoo  USE="-doc -latex -net {-test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[nomerge       ]  dev-python/jinja-2.10::gentoo  USE="-doc -examples {-test}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 
[ebuild     U  ]   dev-python/setuptools-40.0.0::gentoo [36.7.2::gentoo] USE="{test*}" PYTHON_TARGETS="python2_7 python3_5 -pypy -pypy3 -python3_4 -python3_6" 0 KiB

Total: 30 packages (1 upgrade, 29 new), Size of downloads: 6 KiB

 * Error: circular dependencies:

(dev-python/twisted-18.4.0:0/0::gentoo, ebuild scheduled for merge) depends on
 (dev-python/zope-interface-4.5.0:0/0::gentoo, ebuild scheduled for merge) (runtime)
  (dev-python/zope-event-4.3.0:0/0::gentoo, ebuild scheduled for merge) (buildtime)
   (dev-python/nose-1.3.7-r3:0/0::gentoo, ebuild scheduled for merge) (buildtime)
    (dev-python/twisted-18.4.0:0/0::gentoo, ebuild scheduled for merge) (buildtime)

It might be possible to break this cycle
by applying any of the following changes:
- dev-python/nose-1.3.7-r3 (Change USE: -python_targets_python3_5 +python_targets_pypy -python_targets_python2_7)
 (This change might require USE changes on parent packages.)- dev-python/nose-1.3.7-r3 (Change USE: -test)
- dev-python/nose-1.3.7-r3 (Change USE: -python_targets_python3_5 +python_targets_pypy3 -python_targets_python2_7)
 (This change might require USE changes on parent packages.)- dev-python/zope-interface-4.5.0 (Change USE: -test)
- dev-python/zope-event-4.3.0 (Change USE: -test)

Note that this change can be reverted, once the package has been installed.

Note that the dependency graph contains a lot of cycles.
Several changes might be required to resolve all cycles.
Temporarily changing some use flag for all packages might be the better option.

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