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To: python-list@python.org
From: Peter Otten <__peter__@web.de>
Subject: Regular expression syntax, was Re: pylint, was Re: pygame - importing GL - very bad...
Date: Thu, 03 Jan 2013 12:39:12 +0100
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Xref: csiph.com comp.lang.python:36053

someone wrote:

> On 01/03/2013 10:00 AM, Peter Otten wrote:
>> Terry Reedy wrote:
>>
>>>> [a-z_][a-z0-9_]{2,30}$) - so I suppose it wants this name to end with
>>>> [an
>>>> underscore ?
>>>
>>> No, it allows underscores. As I read that re, 'rx', etc, do match. They
>>
>> No, it's one leading letter or underscore [a-z_] plus at least two
>> letters, underscores or digits [a-z0-9_]{2,30}
> 
> Ah, [a-z0-9_]{2,30} means there should be at least two characters and
> maximum 30 characters here ?

Yes. See 

http://docs.python.org/2/library/re.html#regular-expression-syntax