paul j3 added the comment:
This ArgumentDefaultHelpFormatter issue should probably be raised in its own
issue. It applies to 'required' optionals, but any patch would be independent
of the issues discussed here.
This class defines a method that adds the '%(default)' string to the help in
certain situations. It already skips required positionals. So adding a test
for 'action.required' should be easy.
def _get_help_string(self, action):
help = action.help
if '%(default)' not in action.help:
if action.default is not SUPPRESS:
defaulting_nargs = [OPTIONAL, ZERO_OR_MORE]
if action.option_strings or action.nargs in defaulting_nargs:
help += ' (default: %(default)s)'
return help
There are 2 easy user fixes.
- a custom HelpFormatter class that implements this fix.
- 'default=argparse.SUPPRESS' for arguments where you do not want to see the
default. This SUPPRESS is checked else where in the code, but for a required
argument I don't think that matters (but it needs testing).
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<http://bugs.python.org/issue9694>
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