Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsreader4.netcologne.de!news.netcologne.de!xlned.com!feeder7.xlned.com!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!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; 'from:addr:yahoo.co.uk': 0.04; 'assignment': 0.07; 'lawrence': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'referenced': 0.09; 'subject:Why': 0.09; 'python': 0.11; 'def': 0.12; 'language.': 0.14; '2.7.3': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'subject: ?': 0.16; 'language': 0.16; 'wrote:': 0.18; 'variable': 0.18; 'all,': 0.19; 'module': 0.19; 'import': 0.22; 'aug': 0.22; 'header:User-Agent:1': 0.23; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'function': 0.29; "doesn't": 0.30; '"",': 0.31; '>>>>': 0.31; 'marc': 0.31; 'anyone': 0.31; 'file': 0.32; '(most': 0.33; 'to:addr:python-list': 0.38; 'recent': 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'skip:u 10': 0.60; 'tell': 0.60; 'simple': 0.61; 'our': 0.64; 'more': 0.64; 'dear': 0.65; 'subject:this': 0.83; 'received:89': 0.85
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Mark Lawrence <breamoreboy@yahoo.co.uk>
Subject: Re: Why this throws an UnboundLocalError ?
Date: Thu, 30 Jan 2014 22:53:55 +0000
References: <CA+DCN_tQsZDckkueO7FiVYKihy2b9=SdeALJ4RwrQN_uk0dDLQ@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Gmane-NNTP-Posting-Host: host-89-240-160-29.as13285.net
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.2.0
In-Reply-To: <CA+DCN_tQsZDckkueO7FiVYKihy2b9=SdeALJ4RwrQN_uk0dDLQ@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: <https://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: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.6174.1391122453.18130.python-list@python.org>
Lines: 41
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1391122453 news.xs4all.nl 2959 [2001:888:2000:d::a6]:48655
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:65060

On 30/01/2014 22:46, Marc Aymerich wrote:
> Dear all,
>
> I have a very simple module
>
> glic3@e4200:# cat globalstate.py
> GLOBAL = 0
>
> def update():
>      GLOBAL += 1
>
>
> however it doesn't work!!
>
> glic3@e4200:# python
> Python 2.7.3 (default, Aug  1 2012, 05:14:39)
> [GCC 4.6.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import globalstate
>>>> globalstate.update()
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "globalstate.py", line 4, in update
>      GLOBAL += 1
> UnboundLocalError: local variable 'GLOBAL' referenced before assignment
>
>
> And I don't know why :(
> Anyone ?
>
> Thanks!!
>

You must tell the update function that GLOBAL is global.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.

Mark Lawrence