[New-bugs-announce] [issue3262] re.split doesn't split with zero-width regex

[Matthew Barnett]

New submission from Matthew Barnett <python at mrabarnett.plus.com>:

re.split doesn't split a string when the regex matches a zero characters.

For example:

re.split(r'\b', 'a b') returns ['a b'] instead of ['', 'a', ' ', 'b', ''].

re.split(r'(?<!\w)(?=\w)', 'a b') returns ['a b'] instead of ['', 'a ',
'b'].

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components: Regular Expressions
messages: 69134
nosy: mrabarnett
severity: normal
status: open
title: re.split doesn't split with zero-width regex
type: behavior
versions: Python 2.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3262>
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