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

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  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

#9847 — os.path.isdir do not work for Foder named '2011-07-03'

I want to make sure that folder exists.

'2011-07-03' is really exists. but 'os.path.isdir' say false

Does anyone know why?



>>> os.path.isdir("C:\Users\조창준\Desktop\logs")
True
>>> os.path.isdir("C:\Users\조창준\Desktop\logs\2011-07-03")
False

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#9849

2011/7/19 Nulpum <changjun.cho@gmail.com>:
> I want to make sure that folder exists.
>
> '2011-07-03' is really exists. but 'os.path.isdir' say false
>
> Does anyone know why?
>
>
>
>>>> os.path.isdir("C:\Users\조창준\Desktop\logs")
> True
>>>> os.path.isdir("C:\Users\조창준\Desktop\logs\2011-07-03")
> False
Works here. Are you sure that it is not a file ?

>>> os.path.isdir('/tmp/2011-07-03')
True

Python 2.7.1 (r271:86832, Apr 12 2011, 16:15:16)
[GCC 4.6.0 20110331 (Red Hat 4.6.0-2)] on linux2


Kushal
-- 
http://fedoraproject.org
http://kushaldas.in

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#9850

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.

\n means newline, not backslash n

\t means tab, not backslash t

and \201 means octal character 0201 (hex 'x81', decimal 129).

There are three solutions:

(1) Escape every backslash with an extra backslash:

>>> print "logs\\2011-07-03"
logs\2011-07-03


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


(3) Use another operating system. *wink*



-- 
Steven

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#9857

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.

Besides that, and permission issues, ISTM that there are Unicode characters 
(at least non-ASCII characters) in the OP's path, which means they should 
declare

# encoding: utf-8

or something else fitting, and use

os.path.isdir(u"C:/Users/조창준/Desktop/logs/2011-07-03")

or something else fitting.

-- 
PointedEars

Bitte keine Kopien per E-Mail. / Please do not Cc: me.

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#9863

On 7월19일, 오후3시15분, Thomas 'PointedEars' Lahn <PointedE...@web.de>
wrote:
> 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.
>
> Besides that, and permission issues, ISTM that there are Unicode characters
> (at least non-ASCII characters) in the OP's path, which means they should
> declare
>
> # encoding: utf-8
>
> or something else fitting, and use
>
> os.path.isdir(u"C:/Users/조창준/Desktop/logs/2011-07-03")
>
> or something else fitting.
>
> --
> PointedEars
>
> Bitte keine Kopien per E-Mail. / Please do not Cc: me.

Thanks...
u Option is work :)

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#9903

On 7/19/2011 2:15 AM, Thomas 'PointedEars' Lahn wrote:
> 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.
>
> Besides that, and permission issues, ISTM that there are Unicode characters
> (at least non-ASCII characters) in the OP's path, which means they should
> declare
>
> # encoding: utf-8

That is the default in Py3. Not sure of OP specified what he used.
>
> or something else fitting, and use
>
> os.path.isdir(u"C:/Users/조창준/Desktop/logs/2011-07-03")
>

-- 
Terry Jan Reedy

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#9859

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

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#9862

Thomas Jollans wrote:

> On 19/07/11 06:42, Steven D'Aprano wrote:

>> (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'

Well, perhaps, but not all paths can be written as a raw string:

>>> path = r'a\b\c\'
  File "<stdin>", line 1
    path = r'a\b\c\'
                   ^
SyntaxError: EOL while scanning single-quoted string


>> (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?)

Yes, but only just. Python still includes support for VMS, at least for now;
support is scheduled to be dropped in 3.3 and code supporting it to be
removed in 3.4.




-- 
Steven

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#9885

Steven D'Aprano wrote:
> Thomas Jollans wrote:
>> 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?)
> 
> Yes, but only just. Python still includes support for VMS, at least for now;
> support is scheduled to be dropped in 3.3 and code supporting it to be
> removed in 3.4.

Perhaps I misremember, but I thought somebody had stepped forward to 
keep OpenVMS support going?

...

Ah, here it is -- Sandeep Mathew, in thread 'Python Support on OpenVMS' 
on python-dev.

~Ethan~

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#9861

On Jul 19, 1:42 pm, Steven D'Aprano <steve
+comp.lang.pyt...@pearwood.info> 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.
>
> \n means newline, not backslash n
>
> \t means tab, not backslash t
>
> and \201 means octal character 0201 (hex 'x81', decimal 129).
>
> There are three solutions:
>
> (1) Escape every backslash with an extra backslash:
>
> >>> print "logs\\2011-07-03"
>
> logs\2011-07-03
>
> (2) Use forward slashes, as Windows will happily accept them instead of
> backslashes.
>
> (3) Use another operating system. *wink*
>
> --
> Steven

Thank you very much, Steven
You're right.

Now. It's OK.

Thanks again.

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#9851

What is the output of:

>>> os.path.exists("C:\Users\조창준\Desktop\logs\2011-07-03")

?  One possible issue here is that for some reason os.path.isdir()
can't even access the directory either because of permissions,
misinterpretation of the path, or some other reason.

Michael

2011/7/19 Nulpum <changjun.cho@gmail.com>:
> I want to make sure that folder exists.
>
> '2011-07-03' is really exists. but 'os.path.isdir' say false
>
> Does anyone know why?
>
>
>
>>>> os.path.isdir("C:\Users\조창준\Desktop\logs")
> True
>>>> os.path.isdir("C:\Users\조창준\Desktop\logs\2011-07-03")
> False
> --
> http://mail.python.org/mailman/listinfo/python-list
>

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#9852

Nulpum wrote in news:0bf400a3-735c-487a-8d74-
feb3b56be99b@g5g2000prn.googlegroups.com in gmane.comp.python.general:

> I want to make sure that folder exists.
> '2011-07-03' is really exists. but 'os.path.isdir' say false
> Does anyone know why?
> 
>>>> os.path.isdir("C:\Users\조창준\Desktop\logs")
> True
>>>> os.path.isdir("C:\Users\조창준\Desktop\logs\2011-07-03")
> False

Maybe it isn't a directory, but a file, what does os.path.exists() return.

Also could it be a "Shortcut" in which case 2011-07-03.lnk will exist.

Also have you left "Hide extensions for known file types" switched on,
in which case it may really be "2011-07-03.zip" for example, a file 
not a directory even though Windows explorer shows it as a directory.

-- 
Rob.

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#9883

On 2011-07-19, Nulpum <changjun.cho@gmail.com> 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?
>
>
>
>>>> os.path.isdir("C:\Users\??????\Desktop\logs")
> True
>>>> os.path.isdir("C:\Users\??????\Desktop\logs\2011-07-03")
> False

You're not using backslashes corrrectly.   Try assigning the path
names to a "variable" and printing them.  I think you'll see what's
wrong.

I'd try using forward slashes if I were you.

-- 
Grant Edwards               grant.b.edwards        Yow! I'm definitely not
                                  at               in Omaha!
                              gmail.com            

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