Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!newsfeed.xs4all.nl!newsfeed6.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 0.019 X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'received:mail- lpp01m010-f46.google.com': 0.09; 'second.': 0.09; 'subject:while': 0.09; 'cc:addr:python-list': 0.10; 'thread': 0.12; '>>>': 0.14; 'times,': 0.14; '0.2': 0.16; 'limiting': 0.16; 'sleeping': 0.16; '\xa0better': 0.16; 'wrote:': 0.19; 'allows': 0.20; 'trying': 0.20; 'least': 0.20; 'print': 0.21; 'header:In-Reply-To:1': 0.22; 'message-id:@mail.gmail.com': 0.24; 'run': 0.25; 'second': 0.25; 'cheers,': 0.26; 'seconds': 0.26; 'cc:2**0': 0.26; 'said,': 0.27; 'set.': 0.27; 'script': 0.27; 'cc:addr:python.org': 0.28; 'cpu': 0.28; 'text,': 0.28; 'hi,': 0.29; "i'm": 0.29; 'received:209.85.215.46': 0.30; 'reset': 0.31; 'received:209.85': 0.32; 'received:google.com': 0.32; 'probably': 0.32; 'pm,': 0.34; 'received:209': 0.35; 'text': 0.35; 'thank': 0.36; 'pretty': 0.36; 'received:209.85.215': 0.37; 'but': 0.37; 'subject:: ': 0.37; 'means': 0.38; 'header:Received:5': 0.40; 'this,': 0.40; 'less': 0.40; 'indicate': 0.60; 'real': 0.61; '2012': 0.62; '2012,': 0.84; 'cpu.': 0.84; 'flag.': 0.84; 'ian,': 0.84; 'sec.': 0.84; '3:00': 0.91 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; bh=kCzQuaCUVHVWOXz0AnwZG3CAgTlopLuaUnClolY528U=; b=DHFls7PLKsgisTr9HTMIevfE6Vjk0AC3MCuwskYTxuHliftiXyQQ/FbBGyL4Z3+hPc /Un6JXRzh+4ATAebIDWd9NlLfVw/oXYPdex4EqVvjO7+0bIYAOyvh16yJ6NBkigzU2in nzk4ZZgpQqxZ3xzl2w4V3RXH+8xO3ynwqqMNrNWG/MAb3h7zSNdQdtqmHXWnYtMNvWzQ Ih8jEb+FmSF3qtmOJ8Aohqx+h80fKOBL7Ds8XoE7dTO+NnIGGEigbWDEnAzDvKbQNJK+ T9Ambr/fK69uKh6VLAKf6bHP5nZC5agBX5kvxKwYMB9uDVeIlb3APY2I3qVzLqVq2SZV k+AQ== MIME-Version: 1.0 In-Reply-To: <-5854393752682031995@unknownmsgid> References: <7619907723400632495@unknownmsgid> <-5854393752682031995@unknownmsgid> From: Ian Kelly Date: Tue, 3 Apr 2012 15:48:33 -0600 Subject: Re: Run once while loop To: Anatoli Hristov Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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: 1333489744 news.xs4all.nl 6916 [2001:888:2000:d::a6]:55468 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:22640 On Tue, Apr 3, 2012 at 3:00 PM, Anatoli Hristov wrote: > On 03 Apr 2012, at 22:45, Ian Kelly wrote: > >> On Tue, Apr 3, 2012 at 2:36 PM, Anatoli Hristov wrot= e: >>> Hi, >>> >>> I'm trying to do a while loop with condition of time if time is >>> 12:00:00 print text, but for this one second the text is printed at >>> least 50 times, how can I print only once? >> >> Set a flag when you print the text to indicate that you've already >> printed it, and don't print it again if the flag is set. =A0When it's no >> longer 12:00:00, reset the flag. >> >> That said, a busy while loop is probably the wrong way to do this, >> because it will run your CPU at 100%. =A0Better would be to put the >> thread to sleep with time.sleep() calls or a real event loop with a >> timer event. >> >> Cheers, >> Ian > > Thank you Ian, > > what if I wait for other conditions if I use time.sleep for 1 sec? it > means that all the program is sleeping for a sec. You can sleep for less than a second. 0.2 seconds or so allows a pretty nice response time while still limiting how much your script will spin the CPU.