[issue18943] argparse: default args in mutually exclusive groups

[Armin Rigo]

Armin Rigo added the comment:

The patch looks good to me.  It may break existing code, though, as reported on https://bugs.pypy.org/issue1595.  I would say that it should only go to trunk.  We can always fix PyPy (at Python 2.7) in a custom manner, in a "bug-to-bug" compatibility mode.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18943>
_______________________________________