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On Mon, 3/9/15, Tim Chase <python.l...@tim.thechases.com> wrote:
Subject: Re: Letter class in re
To: python-list@python.org
Date: Monday, March 9, 2015, 12:17 PM
On 2015-03-09 11:37,
Wolfgang Maier wrote:
> On 03/09/2015
11:23 AM, Antoon Pardon wrote:
>> Does
anyone know what regular expression to use for a sequence
of
>> letters? There is a class for
alphanumerics but I can't find one
>> for just letters, which I find odd.
>
> how about [a-zA-Z]
?
That breaks if you have
Unicode letters. While ugly, since "\w" is
composed of "letters, numbers, and
underscores", you can assert that
the
"\w" you find is not a number or underscore by
using
(?:(?!_|\d)\w)
I was going to make the same remark, but with a slightly different solution:
In [1]: repr(re.search("[a-zA-Z]", "é"))
Out[1]: 'None'
In [2]: repr(re.search(u"[^\d\W_]+", u"é", re.I | re.U))
Out[2]: '<_sre.SRE_Match object at 0x027CDB10>'
"[^\d\W_]+" means something like "one or more (+) of 'not (a digit, a non-word,
an underscore)'.
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