Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed3.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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'output': 0.05; 'filing': 0.07; 'modify': 0.07; 'python3': 0.07; 'sys': 0.07; '"__main__":': 0.09; '__name__': 0.09; 'f.close()': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:module': 0.09; 'subject:using': 0.09; 'python': 0.11; 'def': 0.12; 'windows': 0.15; '(about': 0.16; '/dev/null': 0.16; 'hex': 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:File': 0.16; 'subject:issue': 0.16; 'tweak': 0.16; 'wrote:': 0.18; 'import': 0.22; '(in': 0.22; 'shell': 0.22; 'header:User-Agent:1': 0.23; 'bytes': 0.24; 'header:X-Complaints- To:1': 0.27; 'url:bugs': 0.29; 'dos': 0.30; 'skip:( 20': 0.30; 'code': 0.31; 'usually': 0.31; 'terminate': 0.31; 'yes.': 0.31; 'quite': 0.32; 'linux': 0.33; 'url:python': 0.33; 'skip:# 10': 0.33; 'could': 0.34; 'problem.': 0.35; 'but': 0.35; 'version': 0.36; 'idle': 0.36; 'similar': 0.36; 'url:org': 0.36; 'seconds': 0.37; 'operating': 0.37; 'skip:o 20': 0.38; 'to:addr:python-list': 0.38; 'expect': 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'even': 0.60; 'hardware': 0.61; 'numbers': 0.61; 'first': 0.61; 'real': 0.63; 'confirm': 0.64; 'user,': 0.69; 'yourself': 0.78; 'faster.': 0.84; 'old.': 0.93 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Peter Otten <__peter__@web.de> Subject: Re: File Read issue by using module binascii Date: Sat, 27 Apr 2013 14:01:35 +0200 Organization: None References: <9b5795ab-baec-4c0a-a3b4-1075cffc8744@googlegroups.com> <2441ce7d-8b3a-405f-ab88-d4e772191eb4@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Gmane-NNTP-Posting-Host: p5084a971.dip0.t-ipconnect.de User-Agent: KNode/4.7.3 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: 42 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1367064104 news.xs4all.nl 15952 [2001:888:2000:d::a6]:48918 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:44447 Jimmie He wrote: >> What shell are you using? The one provided by Idle? > > Yes. I use IDLE,the python version is 3.3.1.What else could I use?? The shell provided by the operating system is usually much faster. When I modify your code to import binascii def read_bmp(): f = open('example.bmp','rb') rawdata = f.read() #f.read(1000) is ok hexstr = binascii.b2a_hex(rawdata) #Get an HEX number bsstr = bin (int(hexstr,16))[2:] f.close() print('bin: ',bsstr,type(bsstr)) return if __name__ == "__main__": read_bmp() and generate a dummy example.bmp with 2**20 (about 1 million) bytes it takes about 2 seconds to terminate -- on hardware that is quite old. If I redirect the output it is even faster: $ time python3 bmp_to_bin.py > /dev/null real 0m0.766s user 0m0.300s sys 0m0.180s I am a Linux user, but expect similar numbers on Windows (in the DOS box or one of its successors). I have considered filing a bug* to ask for a tweak in idle that improves its responsiveness, but first wanted you to confirm that this was indeed the problem. (*) on http://bugs.python.org, if you want to do it yourself