gh-149614 - Restore deepcopiability of argparse.ArgumentParser instances#149617
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DavidCEllis wants to merge 10 commits intopython:mainfrom
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gh-149614 - Restore deepcopiability of argparse.ArgumentParser instances#149617DavidCEllis wants to merge 10 commits intopython:mainfrom
DavidCEllis wants to merge 10 commits intopython:mainfrom
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savannahostrowski
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needs backport to 3.15
| parser.add_argument('bar', nargs='?', default='baz') | ||
| return parser | ||
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| def test_copiable(self): |
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I think we want @force_not_colorized on these tests right?
Separately, we may also be able to fold copiable and deepcopiable into one test, since these are pretty much the same.
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I've left these as two tests for now as there's testing for the different copy/deepcopy behaviour
| import copy | ||
| parser = self._get_parser() | ||
| parser2 = copy.deepcopy(parser) | ||
| ns = parser2.parse_args(['--foo', '123', 'quux']) |
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It'd be more robust to mutate parser2 (e.g. add_argument) and assert parser doesn't see it. As written, the test would still pass if deepcopy silently returned a shallow copy or even the same object.
sobolevn
reviewed
May 9, 2026
an arbitrary dunder name.
…eak-argparse-copy
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With the creation of the
_ColorlessThemeto avoid importing_colorizeearly the new class unfortunately was returning empty strings for__deepcopy__along with other dunder methods which broke deepcopy.I've added tests for
copyanddeepcopybased on the test forpickle.Being more cautious, I've narrowed the class to only returning empty strings on attributes matching those taken from
_colorize.This does mean making sure the set remains in sync which could be more annoying to maintain, it would also be possible to just exclude anything starting with
_. I've updated the test that checks this theme to directly check they are in sync.TypeErrorwhen trying to deepcopyargparse.ArgumentParser()#149614