portage uses deprecated functions that produce warnings with python 2.7: /usr/lib64/portage/pym/portage/xml/metadata.py:220: PendingDeprecationWarning: This method will be removed in future versions. Use 'tree.iter()' or 'list(tree.iter())' instead. for node in self._herdstree.getiterator('herd'): Please note that by default, python 2.7 doesn't show deprecation warnings, it has to be enabled with the environment variable PYTHONWARNINGS="d"
Thanks, this is fixed in git: http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=f4d5667a09cb308f30bb7eb5ee14b9ef061c3604
This is fixed (along with some additional similar warnings) in 2.1.10.12 and 2.2.0_alpha52.