Path: csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!newsfeed.xs4all.nl!newsfeed4a.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 0.014 X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'else:': 0.03; 'executable': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'try:': 0.09; 'suggest': 0.14; 'false):': 0.16; 'finney': 0.16; 'getattr(sys,': 0.16; 'grasp': 0.16; 'pythonic': 0.16; 'readable': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'subject:when': 0.16; 'top-level': 0.16; 'exception': 0.16; 'module': 0.19; 'slightly': 0.19; 'header:User-Agent:1': 0.23; 'satisfying': 0.24; 'looks': 0.24; 'this:': 0.26; 'header:X -Complaints-To:1': 0.27; 'correct': 0.29; 'raise': 0.29; "i'm": 0.30; 'code': 0.31; 'getting': 0.31; 'writes:': 0.31; 'moment': 0.34; 'except': 0.35; 'test': 0.35; 'but': 0.35; 'really': 0.36; 'skip:o 20': 0.38; 'ben': 0.38; 'work?': 0.38; 'to:addr:python- list': 0.38; 'does': 0.39; 'sure': 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'skip:u 10': 0.60; '8bit%:29': 0.60; 'is.': 0.60; 'skip:o 30': 0.61; "you're": 0.61; 'more': 0.64; 'skip:\xe2 10': 0.65; '8bit%:21': 0.69; 'default': 0.69; '8bit%:46': 0.78; '3.4': 0.84; 'idiom': 0.84; 'lastly,': 0.84; 'received:125': 0.84; 'universe': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Ben Finney Subject: Re: Correct idiom for determining path when frozen in 3.4 Date: Mon, 17 Mar 2014 20:02:15 +1100 References: <8a0ca549-7bce-4210-8f9e-3465a769fc3c@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Gmane-NNTP-Posting-Host: jigong.madmonks.org X-Public-Key-ID: 0xBD41714B X-Public-Key-Fingerprint: 9CFE 12B0 791A 4267 887F 520C B7AC 2E51 BD41 714B X-Public-Key-URL: http://www.benfinney.id.au/contact/bfinney-gpg.asc X-Post-From: Ben Finney User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux) Cancel-Lock: sha1:+WIO5JZQpHUazUeYeM00iXqYDro= 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: 43 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1395046954 news.xs4all.nl 2913 [2001:888:2000:d::a6]:53066 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:68415 Mark Summerfield writes: > What is the correct idiom for getting the path to a top-level module I'm not sure I understand what this concept is. What do you mean by “top-level module”? > in 3.3 and 3.4 when the module might be frozen? > > At the moment I'm using this: > > if getattr(sys, "frozen", False): > path = os.path.dirname(sys.executable) > else: > path = os.path.dirname(__file__) That looks okay. Does it work? The code is readable and Pythonic as is. But I would suggest several improvements:: if getattr(sys, "frozen"): # ‘getattr’ will return None by default Also, why test for “sys.frozen” when you're about to use “sys.executable”? if getattr(sys, "executable"): Lastly, it's slightly more Pythonic to execute the normal path unconditionally, and let it raise an exception if there's a problem:: try: executable = sys.executable except AttributeError: executable = __file__ path = os.path.dirname(executable) -- \ “It is far better to grasp the universe as it really is than to | `\ persist in delusion, however satisfying and reassuring.” —Carl | _o__) Sagan | Ben Finney