Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.albasani.net!newsfeed.freenet.ag!news2.euro.net!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 0.020 X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'attribute': 0.07; 'bug.': 0.07; 'initialize': 0.07; 'method.': 0.15; 'artificially': 0.16; 'dave.': 0.16; 'it).': 0.16; 'scope.': 0.16; 'cc:addr:python- list': 0.16; 'wrote:': 0.18; 'thanks,': 0.18; 'instance': 0.18; 'appears': 0.19; 'cc:no real name:2**0': 0.20; 'suggest': 0.20; 'checked': 0.21; 'seconds': 0.21; '(or': 0.22; 'header:In-Reply- To:1': 0.22; 'assigning': 0.23; 'default,': 0.23; 'cc:2**0': 0.24; 'module': 0.26; 'expect': 0.26; 'import': 0.27; 'received:209.85.220': 0.27; 'variable': 0.28; 'url:mailman': 0.28; 'jason': 0.28; 'problem': 0.29; 'cc:addr:python.org': 0.29; 'nov': 0.29; 'pm,': 0.29; 'behaves': 0.30; 'case).': 0.30; 'exists,': 0.30; 'sleep': 0.30; 'useless': 0.30; 'regardless': 0.31; 'does': 0.32; 'url:listinfo': 0.32; 'message-id:@gmail.com': 0.33; 'actually': 0.33; 'rather': 0.33; 'checking': 0.34; 'leaves': 0.34; 'unless': 0.35; 'url:python': 0.36; 'question': 0.36; 'none': 0.37; 'charset:us-ascii': 0.37; 'bound': 0.37; 'skip:" 10': 0.37; 'run': 0.37; 'with.': 0.37; 'reference': 0.37; 'received:google.com': 0.37; "there's": 0.37; 'references': 0.38; 'received:209.85': 0.38; 'url:org': 0.39; 'why': 0.39; 'received:209': 0.40; 'once': 0.60; 'hope': 0.61; 'header:Message- Id:1': 0.62; 'therefore,': 0.66; 'making': 0.67; '26,': 0.67; 'dealing': 0.69; 'relevant': 0.70; '(while': 0.84; 'received:10.0.2': 0.84; 'vanishes': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer; bh=TICK9zy8SEg0MTCFdfAKGZN/Ztfh+o195pXTwn7EF4M=; b=bFk3bxy1flhi6fHrV9+8thnFHSu02igmmFKgUTCwCln9CHaWptKYIOdAcown61aJav FwjNUYSdafsFdRcZrQa7PQ2xlhkyRbxV4dgTh2GOLvxq4g8H2NPxC3NUi4lA3nZ10fPy T55vG+PFX7vVoztJN8MXcSbDcSmQ+WyWfHVY0= Subject: Re: tkinter Mime-Version: 1.0 (Apple Message framework v1251.1) Content-Type: text/plain; charset=us-ascii From: Jason Swails In-Reply-To: Date: Sat, 26 Nov 2011 18:10:40 -0500 Content-Transfer-Encoding: quoted-printable References: To: Dave X-Mailer: Apple Mail (2.1251.1) Cc: python-list@python.org X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 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: 39 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1322349116 news.xs4all.nl 6878 [2001:888:2000:d::a6]:56646 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:16268 The problem is that the logMode1 reference is _only_ bound to the name = logMode1. Assigning it to "variable" in the Checkbutton instance = (logCheck1) does not actually generate a reference to that variable = inside logCheck1. Therefore, once the initialize method terminates, all = references to logMode1 are destroyed and the variable is = garbage-collected. Therefore, that variable will be None by default, regardless of what you = do to it inside "initialize", which is why the button appears unchecked. = If you create a reference to it, then the Checkbutton behaves as you'd = expect (that is, it appears checked). You can verify this easily by = just making logMode1 an attribute of simpleapp_tk (replace logMode1 with = self.logMode1 in every case). You can also see this behavior by artificially lengthening the = initialize method. Import the time module and run "time.sleep(5)" at = the end of initialize, and you will see the check button remain checked = for 5 seconds (while the reference logMode1 survives), before the check = vanishes as sleep ends and the reference leaves scope. I would suggest that this is a checking feature rather than a bug. The = variable that you set is useless unless you plan to use the value (or if = there's a case where you may use it). If such a case exists, then = you'll need a reference to that variable in the relevant scope you're = dealing with. Hope this helps, Jason On Nov 26, 2011, at 4:42 PM, Dave wrote: > = http://forums.devshed.com/python-programming-11/setting-tkinter-checkbox-d= efault-graphical-state-865148.html > Please answer this question I failed to resolve. > Thanks, > Dave. > --=20 > http://mail.python.org/mailman/listinfo/python-list