Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #9859

Re: os.path.isdir do not work for Foder named '2011-07-03'

Show key headers only | View raw

On 19/07/11 06:42, Steven D'Aprano wrote:
> Nulpum wrote:
> 
>> I want to make sure that folder exists.
>>
>> '2011-07-03' is really exists. but 'os.path.isdir' say false
>>
>> Does anyone know why?
> 
> Yes.
> 
>>>> print "logs/2011-07-03"
> logs/2011-07-03
>>>> print "logs\2011-07-03"
> logs�1-07-03
> 
> Don't use backslashes as path separators in Python. Backslashes are used for
> string escapes.
> 
> [snip]
>
> There are three solutions:
> 
> (1) Escape every backslash with an extra backslash:
> 
>>>> print "logs\\2011-07-03"
> logs\2011-07-03

There is a more elegant solution: use raw strings: r'c:\foo\bar'

> (2) Use forward slashes, as Windows will happily accept them instead of
> backslashes.

The "correct" solution in many cases is to not assume any particular
path separator at all, and use os.path.join when dealing with paths.
This will work even on systems that do not accept forward slashes as
path separators. (does Python still support any of those?)

> (3) Use another operating system. *wink*

This, of course, is the only truly tenable solution.

Thomas

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

os.path.isdir do not work for Foder named '2011-07-03' Nulpum <changjun.cho@gmail.com> - 2011-07-18 21:25 -0700
  Re: os.path.isdir do not work for Foder named '2011-07-03' Kushal Das <kushaldas@gmail.com> - 2011-07-19 10:11 +0530
  Re: os.path.isdir do not work for Foder named '2011-07-03' Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-19 14:42 +1000
    Re: os.path.isdir do not work for Foder named '2011-07-03' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-07-19 08:15 +0200
      Re: os.path.isdir do not work for Foder named '2011-07-03' Changjun <changjun.cho@gmail.com> - 2011-07-19 01:25 -0700
      Re: os.path.isdir do not work for Foder named '2011-07-03' Terry Reedy <tjreedy@udel.edu> - 2011-07-19 13:51 -0400
    Re: os.path.isdir do not work for Foder named '2011-07-03' Thomas Jollans <t@jollybox.de> - 2011-07-19 08:30 +0200
      Re: os.path.isdir do not work for Foder named '2011-07-03' Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-19 17:26 +1000
        Re: os.path.isdir do not work for Foder named '2011-07-03' Ethan Furman <ethan@stoneleaf.us> - 2011-07-19 07:22 -0700
    Re: os.path.isdir do not work for Foder named '2011-07-03' Nulpum <changjun.cho@gmail.com> - 2011-07-19 00:21 -0700
  Re: os.path.isdir do not work for Foder named '2011-07-03' Michael Hrivnak <mhrivnak@hrivnak.org> - 2011-07-19 00:42 -0400
  Re: os.path.isdir do not work for Foder named '2011-07-03' Rob Williscroft <rtw@rtw.me.uk> - 2011-07-19 04:56 +0000
  Re: os.path.isdir do not work for Foder named '2011-07-03' Grant Edwards <invalid@invalid.invalid> - 2011-07-19 14:21 +0000

csiph-web