Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder7.xlned.com!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'attribute': 0.05; 'python': 0.09; 'nameerror:': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'str)': 0.09; 'terry': 0.09; 'oct': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'reedy': 0.16; 'wrote:': 0.17; 'jan': 0.18; 'import': 0.21; '"",': 0.22; 'defined': 0.22; 'header:In-Reply-To:1': 0.25; 'header:User- Agent:1': 0.26; '(most': 0.27; 'am,': 0.27; 'regular': 0.27; 'header:X-Complaints-To:1': 0.28; '>>>>': 0.29; 'skip:_ 10': 0.29; 'class': 0.29; "skip:' 10": 0.30; 'file': 0.32; 'traceback': 0.33; 'to:addr:python-list': 0.33; 'jason': 0.35; 'received:org': 0.36; 'but': 0.36; 'subject:: ': 0.38; 'object': 0.38; 'to:addr:python.org': 0.39; 'header:Received:5': 0.40; 'more': 0.63; 'received:fios.verizon.net': 0.84; 'type(s)': 0.84
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Comparing types
Date: Sun, 17 Feb 2013 04:42:20 -0500
References: <CANy1k1iduaZfBfUbVjDP3iHx49-cjKU+50QETgAr_VSXr2eCfg@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Gmane-NNTP-Posting-Host: pool-173-75-251-66.phlapa.fios.verizon.net
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2
In-Reply-To: <CANy1k1iduaZfBfUbVjDP3iHx49-cjKU+50QETgAr_VSXr2eCfg@mail.gmail.com>
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.1891.1361094162.2939.python-list@python.org>
Lines: 31
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1361094162 news.xs4all.nl 6858 [2001:888:2000:d::a6]:39137
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:39025

On 2/17/2013 1:34 AM, Jason Friedman wrote:
> I want to tell whether an object is a regular expression pattern.
>
> Python 3.2.3 (default, Oct 19 2012, 20:10:41)
> [GCC 4.6.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import re
>>>> s = "hello"
>>>> type(s)
> <class 'str'>
>>>> isinstance(s, str)
> True
>>>> my_pattern = re.compile(s)
>>>> type(my_pattern)
> <class '_sre.SRE_Pattern'>

The .__name__ attribute of the class is '_sre.SRE_Pattern'

>>>> isinstance(my_pattern, _sre.SRE_Pattern)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> NameError: name '_sre' is not defined

but the class is not bound to a (builtin) name, including not to 
_sre.SRE_Pattern



-- 
Terry Jan Reedy