Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!feeder.news-service.com!xlned.com!feeder5.xlned.com!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 0.025 X-Spam-Evidence: '*H*': 0.95; '*S*': 0.00; 'dictionary': 0.07; 'answering': 0.09; 'dict': 0.09; 'pm,': 0.10; 'wrote:': 0.14; 'sorted,': 0.16; 'list?': 0.16; 'cc:addr:python-list': 0.17; 'subject:list': 0.19; 'convert': 0.19; 'header:In-Reply-To:1': 0.21; 'cc:no real name:2**0': 0.23; 'function': 0.25; 'example': 0.27; 'thanks': 0.28; 'consist': 0.29; 'cc:addr:python.org': 0.30; 'second': 0.30; 'cc:addr:gmail.com': 0.30; 'tuples': 0.30; 'calling': 0.31; 'usually': 0.32; 'list': 0.33; 'it?': 0.33; 'there': 0.35; 'header:User-Agent:1': 0.35; 'module.': 0.35; 'store': 0.35; 'usual': 0.35; 'cc:2**1': 0.35; 'but': 0.38; 'data': 0.38; 'ok,': 0.38; 'subject:: ': 0.38; 'received:192': 0.38; 'called': 0.39; 'received:192.168.1': 0.40; 'header:Reply- To:1': 0.72; 'reply-to:no real name:2**0': 0.72; '02:59': 0.84; 'to:none': 0.93 Date: Mon, 30 May 2011 09:27:33 -0400 From: Dave Angel User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110424 Thunderbird/3.1.10 MIME-Version: 1.0 Subject: Re: searching in list References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:ANVgMnjBx58tYaSkC/I5rsnxOm80C6mpVi/YHJKVSbB oaav32F08SJlpsj/4zZLOU2OLfG9xDg55m+SPYF0/1jVWn8X5Z f048O9cYFdiXommsKDBPfJK4EEJ+O7yxh9LVJl6rGmPsYrI9ZN Ts6NpZHxjKWGJKRVSCbefGsFZmmDHW/9Ekbo754mIJ3JODugzn k8lofY3w1UdnCjCihNLmQ== Cc: python-list@python.org, vino19 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: davea@ieee.org 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: 15 NNTP-Posting-Host: 82.94.164.166 X-Trace: 1306762090 news.xs4all.nl 49184 [::ffff:82.94.164.166]:49909 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:6657 On 01/-10/-28163 02:59 PM, vino19 wrote: > I want to make a function that is called only once per one argument. I mean I want to store data of function calling to prevent calling it again if there is no need. > How to make it? For example I can make a global list that just consist of tuples > [(arg1, res1), (arg2, res2), ...]. Ok, how to search if an arg135 in that list? > > Thanks for answering > Usual answer is to use a dict. You can convert a list of tuples to a dict by dict(mylist) Second choice is to keep the list sorted, and use the bisect module. But usually a dictionary is better. DaveA