Like this:
>>> import re >>> re.__file__ '/usr/lib/python2.7/re.pyc'
For packages that are not part of the Python kernel, you can also use __path__ :
>>> import requests >>> requests.__file__ '/usr/local/lib/python2.7/dist-packages/requests-1.1.0-py2.7.egg/requests/__init__.pyc' >>> requests.__path__ ['/usr/local/lib/python2.7/dist-packages/requests-1.1.0-py2.7.egg/requests']
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