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Date: Sat, 23 Mar 2013 16:27:53 +0000
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Subject: Re: Required arguments in argparse: at least one of a group
From: Rob Day <robert.day@merton.oxon.org>
To: Marco <m.b@gmail.com>
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Xref: csiph.com comp.lang.python:41746

I don't know about argparse, but if you use docopt
(http://docopt.org/) then this is easy to do with something like:

"""Usage:

finder.py --file <myfile> --dir <mydir>
finder.py --pattern <mypattern> --dir <mydir>
finder.py --file <myfile> --pattern <mypattern> --dir <mydir>
"""

On 23 March 2013 16:04, Marco <m.b@gmail.com> wrote:
> Is there the possibility using the argparse module to group two or more
> arguments in order to have at least one of them required? For instance, I
> would like to have not an error only in the following cases:
>
>   python finder.py --file myfile --dir mydir
>   python finder.py --pattern mypattern --dir mydir
>   python finder.py --file myfile --pattern mypattern --dir mydir
>
> where --dir is required, and --file _or_ --parser have to be specified. In
> other words, I want the parser prints an error message just in this case:
>
>   python finder.py --dir mydir
>
> Thanks in advance, Marco
> --
> Marco
> --
> http://mail.python.org/mailman/listinfo/python-list



-- 
Robert K. Day
robert.day@merton.oxon.org