Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.012 X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'output': 0.05; 'amtsgericht': 0.07; 'hrb': 0.07; "subject:' ": 0.07; 'referenced': 0.09; 'garbage': 0.16; 'rainer': 0.16; 'ralf': 0.16; 'scope,': 0.16; 'subject:break': 0.16; 'subject:generator': 0.16; 'subject:when': 0.16; 'terminate.': 0.16; 'wrote:': 0.18; 'gmbh': 0.22; 'rules': 0.22; 'print': 0.22; 'header:User-Agent:1': 0.23; 'apply.': 0.24; 'germany': 0.24; 'header:In-Reply-To:1': 0.27; 'statement': 0.30; 'guess': 0.33; 'subject:?': 0.36; 'example,': 0.37; 'to:addr:python-list': 0.38; 'does': 0.39; 'to:addr:python.org': 0.39; 'even': 0.60; 'break': 0.61; 'received:194': 0.64; 'skip:+ 10': 0.65; 'tel.:': 0.65; 'here': 0.66; 'frank': 0.68; 'press': 0.70; 'received:192.168.57': 0.84; 'subject:you': 0.87 Date: Tue, 29 Jul 2014 09:17:46 +0200 From: Johannes Schneider User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Icedove/24.5.0 MIME-Version: 1.0 To: python-list@python.org Subject: Re: What happens when you 'break' a generator? References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 48 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1406620022 news.xs4all.nl 2901 [2001:888:2000:d::a6]:42528 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:75343 On 29.07.2014 09:18, Frank Millman wrote: there's not print 'done' statement at the and. > Here I break the loop - > > x = test() > for j in x: > print(j) > if j == 2: > break > > Now the output is - > > start > 0 > 1 > 2 > > 'done' does not appear, so the generator does not actually terminate. What > happens to it? > > My guess is that normal scoping rules apply. Using my example, the generator > is referenced by 'x', so when 'x' goes out of scope, the generator is > garbage collected, even though it never completed. > > Is this correct? > > Frank Millman > > > -- Johannes Schneider Webentwicklung johannes.schneider@galileo-press.de Tel.: +49.228.42150.xxx Galileo Press GmbH Rheinwerkallee 4 - 53227 Bonn - Germany Tel.: +49.228.42.150.0 (Zentrale) .77 (Fax) http://www.galileo-press.de/ Geschäftsführer: Tomas Wehren, Ralf Kaulisch, Rainer Kaltenecker HRB 8363 Amtsgericht Bonn