[docs] [issue13850] Summary tables for argparse add_argument options

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

Looking at the docs, a 4th table in the quick reference section would be useful: the parameters for ArgumentParser itself.

Note that the ArgumentParser and add_arguments() parameters are already summarised in their respective entries, but there are currently no summaries at all for the possible "action" and "nargs" values

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<http://bugs.python.org/issue13850>
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