In win32 and linux platform, os modules has diffreent output order, is it a bug?
env: python 2.7.3 6 test files' name in a directory as below: 12ab Abc Eab a1bc acd bc the following is test code: for root, dirs, files in os.walk(os.getcwd()): print files the output in win32 platform is: ['12ab', 'a1bc', 'Abc', 'acd', 'bc', 'Eab'] but in linux is： ['Eab', 'acd', 'a1bc', '12ab', 'bc', 'Abc' ] they are so different. a bug? -- http://mail.python.org/mailman/listinfo/python-list
Re: In win32 and linux platform, os modules has diffreent output order, is it a bug?
On Fri, Mar 1, 2013 at 12:43 AM, Honghe Wu leopards...@gmail.com wrote: env: python 2.7.3 6 test files' name in a directory as below: 12ab Abc Eab a1bc acd bc the following is test code: for root, dirs, files in os.walk(os.getcwd()): print files the output in win32 platform is: ['12ab', 'a1bc', 'Abc', 'acd', 'bc', 'Eab'] but in linux is： ['Eab', 'acd', 'a1bc', '12ab', 'bc', 'Abc' ] they are so different. a bug? -- The function doesn't specify a particular order, just that it will hand you a list of files. It grabs those from the underlying file system. It looks like Windows sorts it alphabetically and Linux just does whatever (maybe sorted by creation time?). I don't think it's a bug. If the order matters to you, sort it yourself. -- http://mail.python.org/mailman/listinfo/python-list
Re: In win32 and linux platform, os modules has diffreent output order, is it a bug?
On Fri, Mar 1, 2013 at 12:43 AM, Honghe Wu leopards...@gmail.com wrote: env: python 2.7.3 6 test files' name in a directory as below: 12ab Abc Eab a1bc acd bc the following is test code: for root, dirs, files in os.walk(os.getcwd()): print files the output in win32 platform is: ['12ab', 'a1bc', 'Abc', 'acd', 'bc', 'Eab'] but in linux is： ['Eab', 'acd', 'a1bc', '12ab', 'bc', 'Abc' ] they are so different. a bug? Nope. When os.walk() fetches a listing of the contents of a directory, it internally uses os.listdir() (or a moral equivalent thereof). The docs for os.listdir() state that The [returned] list is in arbitrary order.. The order is dependent on the OS and filesystem, and likely also more obscure factors (e.g. the order in which the files were created). The lack of any required ordering allows for improved I/O performance in many/most cases. Cheers, Chris -- http://mail.python.org/mailman/listinfo/python-list
Re: In win32 and linux platform, os modules has diffreent output order, is it a bug?
Thanks! Cause I need sorted returnd list, and the arbitrary list makes the other procedure go wrong. Maybe the I/O speed is more important in other cases. On Mar 1, 2013 4:55 PM, Chris Rebert c...@rebertia.com wrote: On Fri, Mar 1, 2013 at 12:43 AM, Honghe Wu leopards...@gmail.com wrote: env: python 2.7.3 6 test files' name in a directory as below: 12ab Abc Eab a1bc acd bc the following is test code: for root, dirs, files in os.walk(os.getcwd()): print files the output in win32 platform is: ['12ab', 'a1bc', 'Abc', 'acd', 'bc', 'Eab'] but in linux is： ['Eab', 'acd', 'a1bc', '12ab', 'bc', 'Abc' ] they are so different. a bug? Nope. When os.walk() fetches a listing of the contents of a directory, it internally uses os.listdir() (or a moral equivalent thereof). The docs for os.listdir() state that The [returned] list is in arbitrary order.. The order is dependent on the OS and filesystem, and likely also more obscure factors (e.g. the order in which the files were created). The lack of any required ordering allows for improved I/O performance in many/most cases. Cheers, Chris -- http://mail.python.org/mailman/listinfo/python-list
Re: In win32 and linux platform, os modules has diffreent output order, is it a bug?
On Fri, 01 Mar 2013 17:24:05 +0800, Honghe Wu wrote: Thanks! Cause I need sorted returnd list, and the arbitrary list makes the other procedure go wrong. Maybe the I/O speed is more important in other cases. You can sort the lists of files and subdirectories with e.g.: for root, dirs, files in os.walk(os.getcwd()): dirs[:] = sorted(dirs) files = sorted(files) ... Note that modifying the directory list in-place will affect which subdirectories are traversed and in what order. -- http://mail.python.org/mailman/listinfo/python-list
