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Created on 2020-12-02 21:15 by m_khvoinitsky, last changed 2022-04-11 14:59 by admin.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 23617 | open | m_khvoinitsky, 2020-12-02 21:21 | |
| Messages (4) | |||
|---|---|---|---|
| msg382341 - (view) | Author: Mikhail Khvoinitsky (m_khvoinitsky) * | Date: 2020-12-02 21:15 | |
Example which works:
parser.add_argument('--test', nargs='+', metavar=('TEST', 'TEST2'))
Example which doesn't work:
parser.add_argument('test', nargs='+', metavar=('TEST', 'TEST2'))
it raises:
Traceback (most recent call last):
File <omitted>
args = parser.parse_args()
File "/usr/lib/python3.8/argparse.py", line 1768, in parse_args
args, argv = self.parse_known_args(args, namespace)
File "/usr/lib/python3.8/argparse.py", line 1800, in parse_known_args
namespace, args = self._parse_known_args(args, namespace)
File "/usr/lib/python3.8/argparse.py", line 2006, in _parse_known_args
start_index = consume_optional(start_index)
File "/usr/lib/python3.8/argparse.py", line 1946, in consume_optional
take_action(action, args, option_string)
File "/usr/lib/python3.8/argparse.py", line 1874, in take_action
action(self, namespace, argument_values, option_string)
File "/usr/lib/python3.8/argparse.py", line 1044, in __call__
parser.print_help()
File "/usr/lib/python3.8/argparse.py", line 2494, in print_help
self._print_message(self.format_help(), file)
File "/usr/lib/python3.8/argparse.py", line 2471, in format_help
formatter.add_arguments(action_group._group_actions)
File "/usr/lib/python3.8/argparse.py", line 276, in add_arguments
self.add_argument(action)
File "/usr/lib/python3.8/argparse.py", line 261, in add_argument
invocations = [get_invocation(action)]
File "/usr/lib/python3.8/argparse.py", line 549, in _format_action_invocation
metavar, = self._metavar_formatter(action, default)(1)
ValueError: too many values to unpack (expected 1)
Expected result: help message should look like this:
usage: test_argparse [-h] TEST [TEST2 ...]
positional arguments:
TEST
optional arguments:
-h, --help show this help message and exit
|
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| msg382368 - (view) | Author: paul j3 (paul.j3) *  |
Date: 2020-12-03 02:57 | |
Duplicate of https://bugs.python.org/issue14074 argparse allows nargs>1 for positional arguments but doesn't allow metavar to be a tuple |
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| msg382369 - (view) | Author: paul j3 (paul.j3) * |
Date: 2020-12-03 03:00 | |
I'll reopen it - your patch, while not a complete resolution, does take care of the immediate error. |
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| msg401340 - (view) | Author: Irit Katriel (iritkatriel) *  |
Date: 2021-09-07 19:41 | |
Changing type since crash typically means segfault and not an exception. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:38 | admin | set | github: 86713 |
| 2021-09-07 19:41:21 | iritkatriel | set | type: crash -> behavior messages: + msg401340 nosy: + iritkatriel |
| 2020-12-03 03:00:28 | paul.j3 | set | status: closed -> open resolution: duplicate -> messages: + msg382369 |
| 2020-12-03 02:57:52 | paul.j3 | set | status: open -> closed resolution: duplicate messages: + msg382368 stage: patch review -> resolved |
| 2020-12-03 02:48:49 | xtreak | set | nosy:
+ rhettinger, paul.j3 |
| 2020-12-02 21:21:42 | m_khvoinitsky | set | keywords:
+ patch stage: patch review pull_requests: + pull_request22485 |
| 2020-12-02 21:15:50 | m_khvoinitsky | create | |