Updated PEP 394 (python and python2 commands)

PEP 394 [1] saw an update in April 2018 [2], the diffs at [3]. The most important change from my point of view is -* It is suggested that even distribution-specific packages follow the - ``python2``/``python3`` convention, even in code that is not intended to +* It is strongly encouraged that di

Re: PLY problem

[Ole Streicher, 2018-05-16] > # This module includes files automatically generated from ply (these end in > # _lextab.py and _parsetab.py). To generate these files, remove them from this > # folder, then build astropy and run the tests in-place: > # > # python setup.py build_ext --inplace if it'