Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!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; 'static': 0.04; 'assignment': 0.07; 'global,': 0.09; 'happen,': 0.09; 'def': 0.12; 'foo()': 0.16; 'foo():': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'threads.': 0.16; 'too).': 0.16; 'tool.': 0.16; 'wrote:': 0.18; 'trying': 0.19; '(but': 0.19; 'mon,': 0.24; 'holds': 0.26; 'possibly': 0.26; 'code:': 0.26; 'header:In-Reply-To:1': 0.27; 'statement': 0.30; 'message- id:@mail.gmail.com': 0.30; 'code': 0.31; 'figure': 0.32; 'something': 0.35; 'received:google.com': 0.35; 'really': 0.36; 'two': 0.37; 'being': 0.38; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'rather': 0.38; 'to:addr:python.org': 0.39; 'called': 0.40; "you're": 0.61; 'happen': 0.63; 'more': 0.64; 'different': 0.65; 'analysis': 0.75; 'imagine': 0.93; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=DqlCPtc2R58Gpkl/upwQgMbM38EMtteLAky/Fz3RcGQ=; b=c0e8pImNvp+xr8EA8NFBQnhTwxlT5OMqW75fv3Q+KE2QNePGjjmOhgmfZYBltnnW+a YZBqsj0UH5C/ET4KeK5B7Qa7cxisvRWSef9kLY2jCR1MWxhuDgp+rWqK5PJvb+qEymKU MJwMNmzMYs/BogsFH8bK+L6XvYH/Rx0ESI532jt2kfmimOek1eTkWuM+OuWMbCX9c2mf Ykm88T4dRsVzfLwqfw1/fY+hKxE5JDwVT6oXw6w7HFU6I3NO5G0btXYRoXxe6G+AFmn7 ua8zhBZ/JEFct2VqjNnpaqbidHxC7JIg0ecCmo95xLyoBUWwyPJvOMwef8yfV6HAf3iI nycA== MIME-Version: 1.0 X-Received: by 10.68.182.3 with SMTP id ea3mr16161907pbc.124.1382965253128; Mon, 28 Oct 2013 06:00:53 -0700 (PDT) In-Reply-To: <526E5BFA.5080505@globe.de> References: <526E5BFA.5080505@globe.de> Date: Tue, 29 Oct 2013 00:00:53 +1100 Subject: Re: Debugging decorator From: Chris Angelico To: python-list@python.org Content-Type: text/plain; charset=ISO-8859-1 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: 21 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1382965265 news.xs4all.nl 15864 [2001:888:2000:d::a6]:38570 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:57818 On Mon, Oct 28, 2013 at 11:43 PM, Schneider wrote: > 2. In the case of an assignment (but holds for the return statement too). > think about the following code: > > a = 0 > @debugging > def foo(): > a = a + 1 > > def bar(): > #assign something else to a > > Imagine foo() and bar() being called in two different threads. I think threading considerations are rather outside the scope of this tool. If you're trying to figure out what happens when two threads mutate the same global, you really want something a lot more heavy-duty... possibly static code analysis to work out what *might* happen, rather than what *did* happen this particular run. ChrisA