Robert Kern wrote: > On 2013-11-22 16:52, Neal Becker wrote: >> Robert Kern wrote: >> >>> On 2013-11-22 14:56, Neal Becker wrote: >>>> I use arparse all the time and find it serves my needs well. One thing I'd >>>> like >>>> to see. In the help message, I'd like to automatically add the default >>>> values. > >>>> What I'd like to see is: >>>> >>>> --size SIZE [2000] <<< the default value is displayed >>> >>> Use formatter_class=argparse.ArgumentDefaultsHelpFormatter >>> >>> >>> http://docs.python.org/2/library/argparse#argparse.ArgumentDefaultsHelpFormatter > >> Thanks! Almost perfect. Problem is, I don't usually bother to add >> help='help >> me' options. It seems that ArgumentDefaultsHelpFormatter doesn't do anything >> unless help='blah' option is used. Not sure what to do about that. Since >> python test_freq3.py -h >> produces useful messages without my adding help=... everywhere, it'd be nice >> if ArgumentDefaultsHelpFormatter would work here. > > Patches are welcome, I am sure. Implement a HelpFormatter that does what you > want. _format_action() is where the relevant logic is. Try something like > this, and modify to suit. > > > class BeckerDefaultFormatter(argparse.ArgumentDefaultsHelpFormatter): > > def _format_action(self, action): > monkeypatched = False > if action.default is not None and action.help is None: > # Trick the default _format_action() method into writing out > # the defaults. > action.help = ' ' > monkeypatched = True > formatted = super(BeckerDefaultFormatter, > self)._format_action(action) if monkeypatched: > action.help = None > return formatted >
Thanks! Seems to work great. It gave reasonable output for both case where I include help=... and also without. I have no idea how that above code works, but I guess as long as it works... -- https://mail.python.org/mailman/listinfo/python-list
