Python 2/3 multiplexing launcher
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Python 2/3 multiplexing launcher

pythonmux is a binary intended to be installed at /usr/bin/python to multiplex between Python 2 and 3 in a backwards-compatible way. Notably, it will default to running Python 2 to match the historical interface of /usr/bin/python, but scripts can specify that they can run on either Python 2 or 3. Such scripts can be run on a system that only has Python 3 installed, if this launcher is present.

For more details, see my blog post, A proposal for /usr/bin/python between Python 2 and Python 3.

pythonmux is free software licensed under the 2-clause BSD license.