This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author py.user
Recipients py.user
Date 2015-06-20.00:52:41
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
Some misleading behaviour found with option belonging.
It's possible to put one option twicely, so it can set different
parameters accoding to context.

A source of for test:

#!/usr/bin/env python3

import argparse

parser = argparse.ArgumentParser()
parser.add_argument('-f', dest='tf', action='store_true')

subs = parser.add_subparsers()

sub = subs.add_parser('cmd')
sub.add_argument('-f', dest='cf', action='store_true')


args = parser.parse_args()

Running it:

[guest@localhost debug]$ ./ cmd 1
Namespace(arg='1', cf=False, tf=False)
[guest@localhost debug]$ ./ cmd -f 1
Namespace(arg='1', cf=True, tf=False)
[guest@localhost debug]$ ./ cmd 1 -f
Namespace(arg='1', cf=False, tf=True)
[guest@localhost debug]$

ISTM, options for the top parser should be placed between program name and subcommand name in any order, and options for the subcommand should follow subcommand in any order. The argument of top parser should be moved to the end and parsed after all options were placed correctly.
Date User Action Args
2015-06-20 00:52:43py.usersetrecipients: + py.user
2015-06-20 00:52:43py.usersetmessageid: <>
2015-06-20 00:52:42py.userlinkissue24477 messages
2015-06-20 00:52:41py.usercreate