Re: Help for a complex RE

From	Peter Otten <__peter__@web.de>
Newsgroups	comp.lang.python
Subject	Re: Help for a complex RE
Date	2016-05-08 20:19 +0200
Organization	None
Message-ID	<mailman.527.1462731580.32212.python-list@python.org> (permalink)
References	<2aa55bd8-2ea4-41f7-b188-d45dff7d3bb7@googlegroups.com> <ngnomu$n3i$1@ger.gmane.org> <mailman.520.1462724202.32212.python-list@python.org> <6a3fe5cd-0ba9-4017-a763-76c896b8c843@googlegroups.com> <ngnvvl$1pp$1@ger.gmane.org>

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Sergio Spina wrote:

> I know about greedy and not-greedy, but the problem remains.

This makes me wonder why you had to ask

>>> Why the regex engine stops the search at last piece of string?
>>> Why not at the first match of the group "@:"?

To make it crystal clear this time:

>>> import re
>>> 
>>> patt = r"""  # the match pattern is:
... .+?         # one or more characters
... [ ]         # followed by a space
... (?=[@#D]:)  # that is followed by one of the
...             # chars "@#D" and a colon ":"
... """
>>> pattern = re.compile(patt, re.VERBOSE)
>>> m = pattern.match("Jun@i Bun#i @:Janji D:Banji #:Junji")
>>> m.group()
'Jun@i Bun#i '

That's exactly what you asked for in

>>> What can it be a regex pattern with the following result?
>>> 
>>>> In [1]: m = pattern.match("Jun@i Bun#i @:Janji D:Banji #:Junji")
>>>> 
>>>> In [2]: m.group()
>>>> Out[2]: 'Jun@i Bun#i '

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Help for a complex RE Sergio Spina <sergio.am.spina@gmail.com> - 2016-05-08 08:18 -0700
  Re: Help for a complex RE Peter Otten <__peter__@web.de> - 2016-05-08 18:15 +0200
    Re: Help for a complex RE Sergio Spina <sergio.am.spina@gmail.com> - 2016-05-08 09:32 -0700
      Re: Help for a complex RE Terry Reedy <tjreedy@udel.edu> - 2016-05-08 13:17 -0400
      Re: Help for a complex RE Peter Otten <__peter__@web.de> - 2016-05-08 20:19 +0200

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