[Python-Dev] Another update for PEP 394 -- The "python" Command on Unix-Like Systems

Petr Viktorin encukou at gmail.com
Wed Feb 13 10:24:48 EST 2019

PEP 394 says:

 > This recommendation will be periodically reviewed over the next few
 > years, and updated when the core development team judges it
 > appropriate. As a point of reference, regular maintenance releases
 > for the Python 2.7 series will continue until at least 2020.

I think it's time for another review.
I'm especially worried about the implication of these:

- If the `python` command is installed, it should invoke the same
   version of Python as the `python2` command
- scripts that are deliberately written to be source compatible
   with both Python 2.x and 3.x [...] may continue to use `python` on
   their shebang line.

So, to support scripts that adhere to the recommendation, Python 2
needs to be installed :(

Please see this PR for details and a suggested change: 

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