Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder7.xlned.com!newsfeed.xs4all.nl!newsfeed4.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 0.016 X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'sys': 0.07; 'means,': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'def': 0.12; 'template': 0.14; 'thread': 0.14; 'name=none,': 0.16; 'number?': 0.16; 'peak': 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'subject:Thread': 0.16; 'exception': 0.16; 'wrote:': 0.18; 'thu,': 0.19; '>>>': 0.22; 'memory': 0.22; 'import': 0.22; 'print': 0.22; 'header:User- Agent:1': 0.23; 'helper': 0.24; 'question': 0.24; 'second': 0.26; 'header:X-Complaints-To:1': 0.27; '>>>>': 0.31; 'sep': 0.31; 'class': 0.32; 'run': 0.32; 'skip:_ 10': 0.34; 'could': 0.34; 'there': 0.35; '+0200,': 0.36; 'thanks': 0.36; 'subject:?': 0.36; 'to:addr:python-list': 0.38; 'that,': 0.38; 'skip:_ 30': 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'how': 0.40; 'eventually': 0.60; 'hope': 0.61; 'new': 0.61; 'name': 0.63; 'maximum': 0.63; 'reached': 0.63; 'it!': 0.67; 'limit': 0.70; 'upper': 0.74; 'again?': 0.84; 'otten': 0.84; 'peter,': 0.84; 'subject:much': 0.91; 'system:': 0.91; 'reply,': 0.93 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Peter Otten <__peter__@web.de> Subject: Re: Thread-ID - how much could be? Date: Fri, 12 Sep 2014 00:02:50 +0200 Organization: None References: <20140911193018.GA24416@arxnet.hu> <20140911213229.GC26465@arxnet.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8Bit X-Gmane-NNTP-Posting-Host: p57bd9cbc.dip0.t-ipconnect.de User-Agent: KNode/4.13.3 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: 67 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1410472988 news.xs4all.nl 2873 [2001:888:2000:d::a6]:55204 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:77781 Ervin Hegedüs wrote: > Hi Peter, > > thanks for the reply, > > On Thu, Sep 11, 2014 at 09:48:18PM +0200, Peter Otten wrote: >> Ervin Hegedüs wrote: >> >> > Exception in thread Thread-82: >> > ... >> > My question is: how much thread ID could be totally? Is there any >> > maximum number? And if the thread reached that, what will be >> > done? Overlflowed? Couting from 0 again? >> >> A quick peak into threading.py reveals >> >> # Helper to generate new thread names >> _counter = 0 >> def _newname(template="Thread-%d"): >> global _counter >> _counter += 1 >> return template % _counter >> >> class Thread: >> ... >> def __init__(self, group=None, target=None, name=None, >> args=(), kwargs=None, *, daemon=None): >> ... >> self._name = str(name or _newname()) >> >> >> There is no upper limit to the thread name other than that you will >> eventually run out of memory ;) > > thanks - I hope that the memory will not run out by these > threads... :) > > Anyway, that means, on my system: > >>>> import sys >>>> print sys.maxint > 9223372036854775807 > > the couter could be 9223372036854775807? > > And after? :) Try it! >>> print sys.maxint + 1 9223372036854775808 When you start one thread per second >>> sys.maxint / (60*60 * 24 * 365.25) 292271023045.3132 after less than 300 billion years the only thing that will change is the type: >>> type(sys.maxint) >>> type(sys.maxint + 1)