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gh-125542: Deprecate prefix_chars in ArgumentParser.add_argument_group() (GH-125563)

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Savannah Ostrowski 2024-10-17 02:11:47 -07:00 • committed by GitHub
parent 624be8699a
commit 7b04496e5c
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6 changed files with 52 additions and 2 deletions
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8
Lib/argparse.py
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@ -1662,6 +1662,14 @@ class _ActionsContainer(object):
class _ArgumentGroup(_ActionsContainer):
def __init__(self, container, title=None, description=None, **kwargs):
if 'prefix_chars' in kwargs:
import warnings
depr_msg = (
"The use of the undocumented 'prefix_chars' parameter in "
"ArgumentParser.add_argument_group() is deprecated."
)
warnings.warn(depr_msg, DeprecationWarning, stacklevel=3)
# add any missing keyword arguments by checking the container
update = kwargs.setdefault
update('conflict_handler', container.conflict_handler)