Path: csiph.com!usenet.pasdenom.info!news.etla.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed2.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 0.002 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'insert': 0.05; 'output': 0.05; 'binary': 0.07; 'subject:help': 0.08; 'string': 0.09; 'assuming': 0.09; 'spaces': 0.09; 'subject:number': 0.09; 'python': 0.11; '1111': 0.16; 'assignment.': 0.16; 'be:': 0.16; 'columns': 0.16; 'slice.': 0.16; 'subject:python': 0.16; 'wrote:': 0.18; 'bit': 0.19; 'input': 0.22; 'example': 0.22; 'python?': 0.22; 'print': 0.22; 'header :User-Agent:1': 0.23; 'integer': 0.24; 'equivalent': 0.26; 'header :In-Reply-To:1': 0.27; 'function': 0.29; 'am,': 0.29; "i'm": 0.30; '(which': 0.31; 'decimal': 0.31; 'supposed': 0.32; 'regular': 0.32; 'convert': 0.35; 'there': 0.35; 'curious': 0.36; 'doing': 0.36; 'should': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'easy': 0.60; 'you.': 0.62; 'email addr:gmail.com': 0.63; 'received:74.208': 0.68; 'results': 0.69; '0000': 0.84; 'pad': 0.84; 'presumably': 0.84; 'received:74.208.4.194': 0.84; 'str.': 0.91 Date: Thu, 23 May 2013 07:55:36 -0400 From: Dave Angel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 MIME-Version: 1.0 To: python-list@python.org Subject: Re: help in obtaining binary equivalent of a decimal number in python References: <7f794f03-03c9-44de-8312-4ad33b68c266@googlegroups.com> In-Reply-To: <7f794f03-03c9-44de-8312-4ad33b68c266@googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:ZkCLL4RALNxVA3iVIAZtdtkFMLcEHuV5NGgWG+sEzLh 65ANbxUfSj5Wd3KY0HtqVmbuBMlJCTdcEUiJaN1InT3p9GEnfa EdGEE6o7RsF/0BrjBNdQjbUD2pt3YEvhPxSqeScVIYU+55O67W VNqZ3Uq9BB4kZRCavjoOPSfr9RzAIKPqH2vc1kYZb97h0c/SdS mVj6I5ZVQ9WqtT6Gze+TA+sYQPNtCmcL0iMel4knHl69NiXxJL E1el9rkJboNI75JpNvmRlxC+Pim0cbTLZ2nNcf0cf/tURg3UM4 7PBskphH8xK+LbRYCCBeP7NtVwQ838C1f7iYqlQ9oQvv3d9+ba bCj/TJDRdakImBXv9S0E= 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: 35 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1369310150 news.xs4all.nl 15864 [2001:888:2000:d::a6]:56403 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:45803 On 05/23/2013 07:30 AM, lokeshkoppaka@gmail.com wrote: > i need to get 32 bit binary equivalent of a decimal and need to change the 0's to 1's and 1's to 0's > For Example > if the input is 2 > Output should be: > the 32bit equivalent of 2 :0000 0000 0000 0000 0000 0000 0000 0010 > and the 1's compliment is:1111 1111 1111 1111 1111 1111 1111 1101 > > > > is there any pre-defined function to get the above results in python?? > I'm curious as to the intent of the assignment. Are you supposed to be learning about base conversion, about ones and twos complement, or about Python? Assuming the intent is to learn about Python, the built-in function bin() will take a Python integer (which is not decimal) and convert it to a str. At that point, you can manipulate the string any way you like. x = 45 print bin(45) 0b101101 Perhaps you want to start by stripping off the leading '0b' using a slice. Then you want to pad it to 32 columns by prepending some number of zeroes. Then you want to insert some spaces at regular intervals. Presumably doing the ones-complement operation on that string is then pretty easy for you. -- DaveA