Path: csiph.com!usenet.pasdenom.info!news.albasani.net!newsfeed.freenet.ag!news2.euro.net!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 0.037 X-Spam-Evidence: '*H*': 0.93; '*S*': 0.00; 'nasty': 0.07; 'structure,': 0.09; 'thread,': 0.09; 'cc:addr:python-list': 0.10; 'anyway': 0.11; 'add,': 0.16; 'pipes': 0.16; 'module': 0.19; 'all,': 0.21; 'cc:2**0': 0.23; 'elements': 0.23; 'this:': 0.23; 'seems': 0.23; 'cc:no real name:2**0': 0.24; 'cc:addr:python.org': 0.25; 'header:In-Reply-To:1': 0.25; 'wrote': 0.26; 'wonder': 0.27; 'mix': 0.27; 'message-id:@mail.gmail.com': 0.27; 'surprised': 0.29; 'yes.': 0.29; 'url:mailman': 0.29; 'worked': 0.30; 'basic': 0.30; 'code': 0.31; 'url:python': 0.32; 'running': 0.32; 'url:listinfo': 0.32; 'subject:data': 0.33; 'another': 0.33; "can't": 0.34; 'received:google.com': 0.34; 'expected': 0.35; 'posting': 0.35; "won't": 0.35; 'received:209.85': 0.35; 'but': 0.36; 'url:org': 0.36; 'url:library': 0.36; 'communicate': 0.37; 'received:209': 0.37; 'data': 0.37; 'subject:: ': 0.38; 'some': 0.38; 'things': 0.38; 'url:docs': 0.38; 'header:Received:5': 0.40; 'url:mail': 0.40; 'think': 0.40; 'safe': 0.63; 'more': 0.63; 'talking': 0.66; 'actually,': 0.84; 'child,': 0.84; 'nagy': 0.84; 'start.': 0.84 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 :cc:content-type; bh=Vw4foLZvY8yg99lG+RdyNgjPtq0Fb/yIjvecYk3wOuM=; b=q5ghSr/VuDjftwEA7+98Mt7uVpSUCuQTjATWkBGYGGr/coYiHB8jc9k6rDCLSU2/fu rpl2Slbk3JxvdPutGhwe+AHJfov8niij2rtRNPwJdxkbq9TIHTVYGS1kYAq6WtQ/m7Lo 9ZL2DaT6AWteoVW7Y18dyjwZTqwMsCvYfb5/EePTNK6nnvyVKZCopQC1L/qrd6/q9jyU 4zb37y67gL/XQQrXBh0Ii9S8PkXkKt3ItcSG4emu36miTF/agfbig09zK5mwmwPyRowZ OnMuHArjgmMrowCnaYGIWaGt/XJLwjeb+fwZ3+7Mt4sWiVecvi1SBHGoXGGUhphnM7DK /r4A== MIME-Version: 1.0 In-Reply-To: <5017EFB0.6080608@shopzeus.com> References: <5017EFB0.6080608@shopzeus.com> Date: Tue, 31 Jul 2012 16:26:18 +0100 Subject: Re: Pass data to a subprocess From: andrea crotti To: Laszlo Nagy Content-Type: text/plain; charset=ISO-8859-1 Cc: python-list@python.org 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: 31 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1343748380 news.xs4all.nl 6962 [2001:888:2000:d::a6]:43035 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:26319 2012/7/31 Laszlo Nagy : >> I think I got it now, if I already just mix the start before another add, >> inside the Process.run it won't see the new data that has been added after >> the start. So this way is perfectly safe only until the process is launched, >> if it's running I need to use some multiprocess-aware data structure, is >> that correct? > > Yes. Read this: > > http://docs.python.org/library/multiprocessing.html#exchanging-objects-between-processes > > You can use Queues and Pipes. Actually, these are basic elements of the > multiprocessing module and they are well documented. I wonder if you read > the documentation at all, before posting questions here. > > > -- > http://mail.python.org/mailman/listinfo/python-list As I wrote "I found many nice things (Pipe, Manager and so on), but actually even this seems to work:" yes I did read the documentation. I was just surprised that it worked better than I expected even without Pipes and Queues, but now I understand why.. Anyway now I would like to be able to detach subprocesses to avoid the nasty code reloading that I was talking about in another thread, but things get more tricky, because I can't use queues and pipes to communicate with a running process that it's noit my child, correct?