[3.8] bpo-26967: fix flag grouping with allow_abbrev=False (GH-14316) #14759
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The `allow_abbrev` option for ArgumentParser is documented and intended to disable support for unique prefixes of --options, which may sometimes be ambiguous due to deferred parsing. However, the initial implementation also broke parsing of grouped short flags, such as `-ab` meaning `-a -b` (or `-a=b`). Checking the argument for a leading `--` before rejecting it fixes this. This was prompted by pytest-dev/pytestGH-5469, so a backport to at least 3.8 would be great 😄 And this is my first PR to CPython, so please let me know if I've missed anything! https://bugs.python.org/issue26967 (cherry picked from commit dffca9e) Co-authored-by: Zac Hatfield-Dodds <[email protected]>
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@Zac-HD: Status check is done, and it's a success ✅ . |
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@Zac-HD: Status check is done, and it's a success ✅ . |
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@Zac-HD: Status check is done, and it's a success ✅ . |
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The
allow_abbrevoption for ArgumentParser is documented and intended to disable support for unique prefixes of --options, which may sometimes be ambiguous due to deferred parsing.However, the initial implementation also broke parsing of grouped short flags, such as
-abmeaning-a -b(or-a=b). Checking the argument for a leading--before rejecting it fixes this.This was prompted by pytest-dev/pytestGH-5469, so a backport to at least 3.8 would be great 😄
And this is my first PR to CPython, so please let me know if I've missed anything!
https://bugs.python.org/issue26967
(cherry picked from commit dffca9e)
Co-authored-by: Zac Hatfield-Dodds [email protected]
https://bugs.python.org/issue26967