[issue25882] argparse help error: arguments created by add_mutually_exclusive_group() are shown outside their parent group created by add_argument_group()

[paul j3]

paul j3 added the comment:

I've attached a file that monkey patches the _ActionsContainer._add_container_actions method.

It corrects the `_container` attribute of the copied mutually exclusive groups.  I've only tested it for the case presented in this issue (and the relate Stackoverflow question).

I may construct of formal patch later.

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Added file: http://bugs.python.org/file41332/issue25882.py

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