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Fix bug 9340 - argparse parse_known_args didn't work with subparsers

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This commit is contained in:
Steven Bethard 2010-11-02 12:47:22 +00:00
parent b68928bea7
commit fca2e8aeb8
2 changed files with 34 additions and 2 deletions
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14
Lib/argparse.py
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@ -102,6 +102,7 @@ ZERO_OR_MORE = '*'
ONE_OR_MORE = '+'
PARSER = 'A...'
REMAINDER = '...'
_UNRECOGNIZED_ARGS_ATTR = '_unrecognized_args'
# =============================
# Utility functions and classes
@ -1083,7 +1084,12 @@ class _SubParsersAction(Action):
raise ArgumentError(self, msg)
# parse all the remaining options into the namespace
parser.parse_args(arg_strings, namespace)
# store any unrecognized options on the object, so that the top
# level parser can decide what to do with them
namespace, arg_strings = parser.parse_known_args(arg_strings, namespace)
if arg_strings:
vars(namespace).setdefault(_UNRECOGNIZED_ARGS_ATTR, [])
getattr(namespace, _UNRECOGNIZED_ARGS_ATTR).extend(arg_strings)
# ==============
@ -1699,7 +1705,11 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
# parse the arguments and exit if there are any errors
try:
return self._parse_known_args(args, namespace)
namespace, args = self._parse_known_args(args, namespace)
if hasattr(namespace, _UNRECOGNIZED_ARGS_ATTR):
args.extend(getattr(namespace, _UNRECOGNIZED_ARGS_ATTR))
delattr(namespace, _UNRECOGNIZED_ARGS_ATTR)
return namespace, args
except ArgumentError:
err = _sys.exc_info()[1]
self.error(str(err))

22
Lib/test/test_argparse.py
View File

@ -1773,6 +1773,28 @@ class TestAddSubparsers(TestCase):
NS(foo=True, bar=0.125, w=None, x='c'),
)
def test_parse_known_args(self):
self.assertEqual(
self.parser.parse_known_args('0.5 1 b -w 7'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), []),
)
self.assertEqual(
self.parser.parse_known_args('0.5 -p 1 b -w 7'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-p']),
)
self.assertEqual(
self.parser.parse_known_args('0.5 1 b -w 7 -p'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-p']),
)
self.assertEqual(
self.parser.parse_known_args('0.5 1 b -q -rs -w 7'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-q', '-rs']),
)
self.assertEqual(
self.parser.parse_known_args('0.5 -W 1 b -X Y -w 7 Z'.split()),
(NS(foo=False, bar=0.5, w=7, x='b'), ['-W', '-X', 'Y', 'Z']),
)
def test_dest(self):
parser = ErrorRaisingArgumentParser()
parser.add_argument('--foo', action='store_true')