[issue39230] fail on datetime import if _datetime.py exists in PATH

[mmckerns]

mmckerns <mmckerns at caltech.edu> added the comment:

Sure, that's obvious for `datetime` and `sys`.  Less obvious for unexpected conflicts with stdlib modules that begin with an underscore...

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39230>
_______________________________________