Path: csiph.com!usenet.pasdenom.info!news.etla.org!news.stack.nl!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 0.037 X-Spam-Evidence: '*H*': 0.93; '*S*': 0.00; 'exception.': 0.09; 'messing': 0.09; 'subject:board': 0.09; 'python': 0.11; 'called.': 0.16; 'code?': 0.16; 'imports': 0.16; 'script,': 0.16; 'all.': 0.16; 'wrote:': 0.18; 'bit': 0.19; 'module': 0.19; 'trying': 0.19; 'mechanism': 0.19; 'value.': 0.19; 'import': 0.22; 'header:User- Agent:1': 0.23; 'circular': 0.24; 'documented': 0.24; 'module,': 0.24; 'looks': 0.24; 'question': 0.24; "i've": 0.25; 'script': 0.25; 'logging': 0.26; 'subject:/': 0.26; 'header:In-Reply-To:1': 0.27; 'record': 0.27; 'function': 0.29; "i'm": 0.30; 'gives': 0.31; 'that.': 0.31; 'globally': 0.31; 'once,': 0.31; 'run': 0.32; '(including': 0.33; 'could': 0.34; 'subject: (': 0.35; 'board': 0.35; 'connection': 0.35; 'there': 0.35; 'accessing': 0.36; 'doing': 0.36; 'somebody': 0.38; 'to:addr:python-list': 0.38; 'issue': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'hardware': 0.61; 'new': 0.61; "you're": 0.61; 'here:': 0.62; 'email addr:gmail.com': 0.63; 'more': 0.64; 'received:74.208': 0.68; 'saving': 0.69; "it'd": 0.84; 'received:74.208.4.194': 0.84; "they'd": 0.84; 'mistake': 0.91; 'subject:available': 0.93 Date: Wed, 08 May 2013 17:20:54 -0400 From: Dave Angel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130329 Thunderbird/17.0.5 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Globally available I/O connection (K8055 I/O board) References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:tCXpz4l4eaPPsek1Dnzg5w+nKEf/NwNpjAEHZZAMRvQ HtE6Fz1GmEt4F/U5BzHoNn+aiQiu5FRomMcO5U5FGttzFRFJ7H P9dfb+AMv11YKoeI8mjxK7NoDU+5yLOr3RKRGD5GT/goB0/M9f Am3qNfHB/g/0fUlQrmQm17o4qu07+kr3cD0SdJ9UT2z2Fup4W7 t9x+emoALJpoVi/mS00fzlT5Tqwi/T489aa7U1IBZSD7cdkGTx AYcUe+E/xr79vUoRbDKHwan1vqfCbUmi2qMCtZvkhG/vKXkaOi 0YCCwkqOKNIenc/arNjaSBC9pW8WtDlzl32Muyajtg4Rc22tQ= = 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: 32 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1368048077 news.xs4all.nl 15874 [2001:888:2000:d::a6]:53653 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:44970 On 05/08/2013 04:50 PM, flexage@gmail.com wrote: > I'm having a bit of an issue trying to make a globally available connection to my Velleman K8055 I/O board... > > I've documented my issue as best I can here: http://stackoverflow.com/questions/16449706/python-access-global-instance-of-connection > I don't think that's a Python question at all. You have some constraint your hardware gives you that requires you to run function k8055(0) once, and to use that result object to access the board subsequently. Looks to me like you're doing exactly that. Are there any other calls to that function in your code? If you were messing up with your access to the global object globalK8055, you'd get an exception. The only Python mistake I can think of that you might be doing is if you're using your script as a module, or otherwise doing circular imports, or if you're accessing some module under more than one name. In particular, if you run SmartyPi/appglobals.py as a script, it'd be calling the k8055() function once and saving the value. And then when somebody imports it as from smartypi.appglobals import globalK8055 as k they'd get a NEW instance of the module and a new value for globalK8055. If you have some form of logging mechanism (including print), you could record each time the k8055() is called. -- DaveA