Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'subject:module': 0.04; '__name__': 0.09; 'from:addr:ethan': 0.09; 'from:addr:stoneleaf.us': 0.09; 'from:name:ethan furman': 0.09; 'message-id:@stoneleaf.us': 0.09; 'received:184.172': 0.09; 'received:gator410.hostgator.com': 0.09; '~ethan~': 0.09; 'def': 0.13; "'__main__':": 0.16; '(key': 0.16; '*args):': 0.16; 'received:72.11': 0.16; 'received:72.11.125': 0.16; 'received:72.11.125.166': 0.16; 'wrote:': 0.18; 'slightly': 0.19; 'header:In-Reply-To:1': 0.22; "i'm": 0.28; 'class': 0.29; 'either.': 0.30; 'key,': 0.30; 'that...': 0.30; 'value)': 0.30; 'subject:?': 0.31; 'header:User-Agent:1': 0.33; 'to:addr:python- list': 0.35; 'skip:_ 10': 0.38; 'to:addr:python.org': 0.40; 'more': 0.61; 'love': 0.63; 'received:websitewelcome.com': 0.64; 'hate': 0.73; 'received:gateway15.websitewelcome.com': 0.84 Date: Thu, 09 Feb 2012 16:05:41 -0800 From: Ethan Furman User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) MIME-Version: 1.0 To: python-list@python.org Subject: Re: multiple namespaces within a single module? References: <6f50fa3d-74e6-4682-b5d8-2634d418dd23@d15g2000yqg.googlegroups.com> <4F3436CA.2020800@stoneleaf.us> <4F3447EA.6070601@stoneleaf.us> In-Reply-To: <4F3447EA.6070601@stoneleaf.us> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator410.hostgator.com X-AntiAbuse: Original Domain - python.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - stoneleaf.us X-BWhitelist: no X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: mail.admailinc.com ([192.168.10.136]) [72.11.125.166]:3179 X-Source-Auth: ethan+stoneleaf.us X-Email-Count: 2 X-Source-Cap: dG9idWs7dG9idWs7Z2F0b3I0MTAuaG9zdGdhdG9yLmNvbQ== 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: 49 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1328831986 news.xs4all.nl 6897 [2001:888:2000:d::a6]:53097 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:20121 Ethan Furman wrote: > Hrm -- and functions/classes/etc would have to refer to each other that > way as well inside the namespace... not sure I'm in love with that... Not sure I hate it, either. ;) Slightly more sophisticated code:


class NameSpace(object):
     def __init__(self, current_globals):
         self.globals = current_globals
         self.saved_globals = current_globals.copy()
     def __enter__(self):
         return self
     def __exit__(self, *args):
         new_items = []
         for key, value in self.globals.items():
             if (key not in self.saved_globals and value is not self
                     or key in self.saved_globals
                     and value != self.saved_globals[key]):
                 new_items.append((key, value))
         for key, value in new_items:
             setattr(self, key, value)
             del self.globals[key]
         self.globals.update(self.saved_globals)

if __name__ == '__main__':
     x = 'inside main!'
     with NameSpace(globals()) as a:
         x = 'inside a?'
         def fn1():
             print(a.x)
     with NameSpace(globals()) as b:
         x = 'inside b?'
         def fn1():
             print(b.x)
         def fn2():
             print('hello!')
             b.fn1()
     y = 'still inside main'
     a.fn1()
     b.fn1()
     print(x)
     print(y)

~Ethan~