Path: csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!newsfeed.eweka.nl!eweka.nl!feeder3.eweka.nl!newsfeed.xs4all.nl!newsfeed5.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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'example:': 0.03; 'python.': 0.04; 'situation.': 0.04; 'suppose': 0.05; 'type,': 0.07; 'python': 0.08; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'output': 0.10; '10}': 0.16; 'naive': 0.16; 'received:dip.t-dialin.net': 0.16; 'received:t-dialin.net': 0.16; '(i.e.': 0.17; 'wrote:': 0.18; 'skip:[ 20': 0.19; 'from:addr:web.de': 0.23; 'module,': 0.23; 'defined': 0.24; 'guess': 0.26; 'resolution': 0.26; 'module': 0.26; 'code': 0.26; 'all,': 0.27; 'server.': 0.28; 'project,': 0.28; "i'm": 0.28; 'mix': 0.29; "who'd": 0.30; 'sufficient': 0.32; 'requests': 0.32; 'header:User-Agent:1': 0.33; 'header:X-Complaints-To:1': 0.34; 'arrival': 0.34; 'skip:i 40': 0.34; 'to:addr:python-list': 0.35; 'however,': 0.35; 'project': 0.35; 'two': 0.36; 'received:org': 0.36; 'run': 0.37; 'similar': 0.37; 'using': 0.37; 'another': 0.37; 'some': 0.38; 'doing': 0.38; 'getting': 0.38; 'should': 0.38; 'same.': 0.39; 'might': 0.40; 'to:addr:python.org': 0.40; 'type': 0.61; 'total': 0.61; 'talking': 0.62; '1000': 0.62; 'below': 0.62 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Peter Otten <__peter__@web.de> Subject: Re: Distribution Date: Tue, 20 Mar 2012 10:15:01 +0100 Organization: None References: <33044d51-c481-4796-a722-406f412cf994@x7g2000pbi.googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Gmane-NNTP-Posting-Host: p50849737.dip.t-dialin.net User-Agent: KNode/4.7.3 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: 40 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1332234906 news.xs4all.nl 6882 [2001:888:2000:d::a6]:51342 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:21920 prince.pangeni wrote: > Hi all, > I am doing a simulation project using Python. In my project, I want > to use some short of distribution to generate requests to a server. > The request should have two distributions. One for request arrival > rate (should be poisson) and another for request mix (i.e. out of the > total requests defined in request arrival rate, how many requests are > of which type). > Example: Suppose the request rate is - 90 req/sec (generated using > poisson distribution) at time t and we have 3 types of requests (i.e. > r1, r2, r2). The request mix distribution output should be similar to: > {r1 : 50 , r2 : 30 , r3 : 10} (i.e. out of 90 requests - 50 are of r1 > type, 30 are of r2 type and 10 are of r3 type). > As I an new to python distribution module, I am not getting how to > code this situation. Please help me out for the same. You don't say what distribution module you're talking of, and I guess I'm not the only one who'd need to know that detail. However, with sufficient resolution and duration the naive approach sketched below might be good enough. # untested DURATION = 3600 # run for one hour RATE = 90 # requests/sec RESOLUTION = 1000 # one msec requests = ([r1]*50 + [r2]*30 + [r3]*10) time_slots = [0]*(RESOLUTION*DURATION) times = range(RESOLUTION*DURATION) for _ in range(DURATION*RATE): time_slots[random.choice(times)] += 1 for time, count in enumerate(time_slots): for _ in range(count): issue_request_at(random.choice(requests), time)