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Wed Jul 21 03:24:24 CEST 2004 · https://mail.python.org/pipermail/python-dev/2004-July/046384.html

Chris King <colanderman at gmail.com> writes:
> This precludes use of patterns that can successfully match zero-length
> strings (e.g. r'(?<=[A-Za-z])(?=[^A-Za-z])'.

As you say, it's very useful to be able to match such zero-length patterns.  I
posted a patch that fixes this, but have not heard any comments on it.  Please
take a look and post a comment if you like.

   https://sourceforge.net/tracker/index.php?func=detail&aid=988761&group_id=5470&atid=305470

Mike

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[Python-Dev] Re: sre.split question