[issue8538] Add ConfigureAction to argparse

[Yaniv Aknin]

Yaniv Aknin <yaniv.aknin at gmail.com> added the comment:

I'm looking into making a patch from this for py3k, and have the following observations:

1. I agree with merwok, at the moment the monolithic ConfigureAction is a bit excessive for most uses (other than maybe emulating ./Configure...). I vote we split it to FlagAction and ConfigureAction.
2. I don't think this should be added as an argparse builtin/registered action (like action='store' or action='count'), but rather as a ready-made user-action in a separate namespace (from argparse.actions import FlagAction)

Given feedback that these two decisions seem sane, I'd be happy to produce a patch against recent py3k.

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<http://bugs.python.org/issue8538>
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