Path: csiph.com!usenet.pasdenom.info!dedibox.gegeweb.org!gegeweb.eu!nntpfeed.proxad.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed2.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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'mrab': 0.05; 'subject:Python': 0.06; 'installed.': 0.07; 'python3': 0.07; 'work!': 0.07; 'collier': 0.09; 'executable': 0.09; 'falls': 0.09; 'skip:/ 10': 0.09; 'wrong,': 0.09; 'cc:addr:python-list': 0.11; 'python': 0.11; '2.7': 0.14; 'binary.': 0.16; 'from:addr:timgolden.me.uk': 0.16; 'from:name:tim golden': 0.16; 'message-id:@timgolden.me.uk': 0.16; 'received:74.55.86': 0.16; 'received:74.55.86.74': 0.16; 'received:smtp.webfaction.com': 0.16; 'received:webfaction.com': 0.16; 'symlink': 0.16; 'tjg': 0.16; 'uninstall': 0.16; 'skip:# 20': 0.16; 'wrote:': 0.18; 'command': 0.22; '>>>': 0.22; 'shell': 0.22; 'cc:addr:python.org': 0.22; 'header:User-Agent:1': 0.23; 'error': 0.23; 'him.': 0.24; 'received:192.168.100': 0.24; 'tells': 0.24; 'file.': 0.24; '(or': 0.24; 'cc:2**0': 0.24; 'script': 0.25; 'skip:" 20': 0.27; 'header :In-Reply-To:1': 0.27; 'point': 0.28; 'am,': 0.29; "doesn't": 0.30; 'skip:( 20': 0.30; "i'm": 0.30; 'code': 0.31; '3.x': 0.31; 'safely': 0.31; 'file': 0.32; 'run': 0.32; 'another': 0.32; 'there,': 0.34; 'message.': 0.35; 'johnson': 0.35; 'but': 0.35; 'throughout': 0.37; 'manager': 0.38; 'work?': 0.38; 'whatever': 0.38; 'how': 0.40; 'skip:u 10': 0.60; 'hope': 0.61; 'first': 0.61; 'back': 0.62; 'kind': 0.63; 'due': 0.66; 'latest': 0.67; 'from:addr:mail': 0.83; 'to:none': 0.92 Date: Fri, 26 Jul 2013 11:47:24 +0100 From: Tim Golden User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130307 Thunderbird/17.0.4 MIME-Version: 1.0 CC: Python Mailing List Subject: Re: Python Script Hashplings References: <51F12B41.3050004@Gmail.com> <51F12E31.1070502@mrabarnett.plus.com> <51F2517D.2070009@Gmail.com> In-Reply-To: <51F2517D.2070009@Gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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: 36 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1374835648 news.xs4all.nl 15894 [2001:888:2000:d::a6]:51129 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:51296 On 26/07/2013 11:37, Devyn Collier Johnson wrote: > > On 07/25/2013 09:54 AM, MRAB wrote: >> On 25/07/2013 14:42, Devyn Collier Johnson wrote: >>> If I execute a Python3 script with this haspling (#!/usr/bin/python3.3) >>> and Python3.3 is not installed, but Python3.2 is installed, would the >>> script still work? Would it fall back to Python3.2? >>> >> Why don't you try it? >> >>> I hope Dihedral is listening. I would like to see another response >>> from HIM. >>> >> > Good point, but if it falls back to Python3.2, how would I know? Plus, I > have Python3.3, 3.2, and 2.7 installed. I cannot uninstall them due to > dependencies. Devyn, I'm not a *nix person so someone can point out if I'm wrong, but my understanding is that the shebang line (or whatever you want to call it) just tells the shell: run this command to run this file. So you can put "#!/usr/bin/fish-and-chips" as the first line and it will try to run the file using /usr/bin/fish-and-chips. If you put #!/usr/bin/python3.3 the shell will use the executable /usr/bin/python3.3. It doesn't know or care about Python or its versions: it won't go looking for some alternative binary. If /usr/bin/python3.3 isn't there, the shell will fail to run the code with some kind of error message. If you or your package manager symlink /usr/bin/python3 to whatever the latest Python 3.x is on your system then you can safely use /usr/bin/python3 throughout and let the symlink do the work! TJG