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[3.13] gh-53780: Ignore the first "--" (double dash) between an option and command in argparse (GH-124275) (GH-125073)

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(cherry picked from commit c578271366)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Miss Islington (bot) 2024-10-08 00:51:07 +02:00 • committed by GitHub
parent a380dc6836
commit db3ccd8b62
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3 changed files with 23 additions and 4 deletions
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12
Lib/argparse.py
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@ -2097,11 +2097,15 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
# and add the Positional and its args to the list
for action, arg_count in zip(positionals, arg_counts):
args = arg_strings[start_index: start_index + arg_count]
# Strip out the first '--' if it is not in PARSER or REMAINDER arg.
if (action.nargs not in [PARSER, REMAINDER]
and arg_strings_pattern.find('-', start_index,
# Strip out the first '--' if it is not in REMAINDER arg.
if action.nargs == PARSER:
if arg_strings_pattern[start_index] == '-':
assert args[0] == '--'
args.remove('--')
elif action.nargs != REMAINDER:
if (arg_strings_pattern.find('-', start_index,
start_index + arg_count) >= 0):
args.remove('--')
args.remove('--')
start_index += arg_count
if args and action.deprecated and action.dest not in warned:
self._warning(_("argument '%(argument_name)s' is deprecated") %