Finding the version of a Python module

To find the version of a Python module, eg. the ete2 module, that is installed:
% python2
>>> import pkg_resources
>>> pkg_resources.get_distribution("ete2").version
'2.2.1072'
This means we have ete2 version 2.2.1072.

Find out where the Python module is loaded from:
>>> import ete2
>>> print ete2.__file__
/software/pathogen/external/lib/python2.7/site-packages/ete2-2.3.10-py2.7.egg/ete2/__init__.pyc
>>> import ete3
>>> print ete3.__file__
/software/pathogen/external/lib/python2.7/site-packages/ete3-3.0.0b7-py2.7.egg/ete3/__init__.pyc