library for generating Python executable zip files

 pex is a library for generating .pex (Python EXecutable) files which
 are executable Python environments in the spirit of virtualenvs. pex
 is an expansion upon the ideas outlined in PEP 441 and makes the
 deployment of Python applications as simple as cp. pex files may even
 include multiple platform-specific Python distributions, meaning that
 a single pex file can be portable across Linux and OS X.
 .
 pex files can be built using the pex tool. Build systems such as
 Pants and Buck also support building .pex files directly.
 .
 This is the Python 3 library version.