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I don’t trust python system packages : half are rotten. Virtualenv + Pip, just for providing a tool inside Docker? Oversized.

Lets PEX. PEX is one of the secret weapons of Twitter. PEX is for Python EXecutable. PEX is a single file, embeding dependencies and an executable module. This file is a ZIP archive. The ZIP format accepts arbitrary headers, and python can load modules in a ZIP, PEX married both.
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"""
pex est un outil plutôt cool pour packager des applis python.
on est pas obligé d'utiliser docker pour en avoir besoin.
doc: http://pex.readthedocs.org/en/latest/
video: http://www.youtube.com/watch?v=NmpnGhRwsu0