[issue9694] argparse required arguments displayed under "optional arguments"
paul j3
report at bugs.python.org
Fri Feb 14 08:32:12 CET 2014
paul j3 added the comment:
Here's another possible solution: add a `help_groups` parameter to ArgumentParser. It is a list of base argument group names. `parser.add_argument(...)' places the action in one of those groups.
This is a generalization of the current code which creates two groups titled 'positional arguments' and 'optional arguments', and assigns actions based on 'optional strings' (e.g. '-f','--foo').
'help_groups' could have 1, 2, or 3 items.
1 - just one argument group
2 - the current postional/optional split, but with user chosen names
3 - a 'positional', 'required', and 'optional' split.
A 4 way split that distinguishes splits positionals between those that allow 0 values and 1 or more, is possible, but probably not that useful.
The changes are in the ArgumentParser.__init__ and _add_action methods.
'subparsers' do not inherit this parameter. I have not explored how it plays out with 'parents'. 'test_argparse.py' runs fine.
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keywords: +patch
Added file: http://bugs.python.org/file34073/helpgroups.diff
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