Jackson Riley <[email protected]> added the comment:
I've got a bit confused and am doubting myself - is the below output expected?
>>> m = re.match('(?:()|(?(1)()|z)){1,2}(?(2)a|z)', 'a')
>>> m.groups()
('', '')
>>> m = re.match('(?:()|(?(1)()|z)){1,2}(?(1)a|z)', 'a')
>>> m.groups()
('', None)
The first pattern doesn't behave as I would (probably naively expect) given
Matthew's explanation of this bug - wouldn't the bug cause the match to fail
with {1,2} as well?
Also, it seems odd that changing the condition in the if clause should change
what gets captured.
Anyone have any thoughts?
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Python tracker <[email protected]>
<https://bugs.python.org/issue23692>
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