Matthew Barnett <[email protected]> added the comment:
Consider re.findall(r'.{0,2}', 'abcde').
It finds 'ab', then continues where it left off to find 'cd', then 'e'.
It can also find ''; re.match(r'.*', '') does match, after all.
It could, in fact, an infinite number of ''.
And what about re.match(r'()*', '')?
What should it do? Run forever? Raise an exception?
At some point you have to make a decision as to what should happen, and the
general consensus has been to match once.
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<https://bugs.python.org/issue32308>
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