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Date: Thu, 21 Apr 2011 15:57:22 +0200
Subject: Re: Groups in regular expressions don't repeat as expected
From: Vlastimil Brom <vlastimil.brom@gmail.com>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:3796

2011/4/20 John Nagle <nagle@animats.com>:
> Here's something that surprised me about Python regular expressions.
>
>>>> krex =3D re.compile(r"^([a-z])+$")
>>>> s =3D "abcdef"
>>>> ms =3D krex.match(s)
>>>> ms.groups()
> ('f',)
>
>...

> "If a group is contained in a part of the pattern that matched multiple
> times, the last match is returned."
>
> That's kind of lame, though. I'd expect that there would be some way
> to retrieve all matches.
>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0John Nagle
> --
> http://mail.python.org/mailman/listinfo/python-list

Hi,
do you mean something like:

>>> import regex
>>> ms =3D regex.match(r"^([a-z])+$", "abcdef")
>>> ms.captures(1)
['a', 'b', 'c', 'd', 'e', 'f']
>>>

>>> help(ms.captures)
Help on built-in function captures:

captures(...)
    captures([group1, ...]) --> list of strings or tuple of list of strings=
.
    Return the captures of one or more subgroups of the match.  If there is=
 a
    single argument, the result is a list of strings; if there are multiple
    arguments, the result is a tuple of lists with one item per argument; i=
f
    there are no arguments, the captures of the whole match is returned.  G=
roup
    0 is the whole match.

>>>

cf.
http://pypi.python.org/pypi/regex

hth,
  vbr