ok, I understand better now, some more points.
You need to handle the case that it doesn't find the file after the
for loop, one source of a None return.
also as mentioned in point 2 when recursing you need to return the result so:
if os.path.isdir(full_path):
findFile(full_path)
becomes
if os.path.isdir(full_path):
return findFile(full_path)
Another thing you need to test is I don't know if you will always
receive files and folders in the same order which means that the nth
file won't be consistent.
On Tue, Feb 24, 2009 at 9:27 AM, venu madhav <venutaurus...@gmail.com> wrote:
> Hello,
> The value of n is initialized in the main procedure which calls it.
> Basically I am trying to find the n'th file in the directory(can be in its
> sub directories too). As I've given the previous mail itself
> file = findFile(path)
> invokes that function.When the path is a
> directory it just recurses into it. And coming to your idea of storing all
> the items in a list can't be used here because my folder contain thousands
> of files and storing them in a list would eat up my memory.
> Thanks for your suggestions,
> Venu
> On Tue, Feb 24, 2009 at 12:49 PM, Gerdus van Zyl <gerdusvan...@gmail.com>
> wrote:
>>
>> I see a couple of problems with your code:
>>
>> 1. where is n first given a value and what is it total file count,
>> etc? also you decrement the value, do you want the last file in the
>> directory or something?
>> 2. The if os.path.isdir(full_path): .. findFile(full_path) part
>> doesn't return or handle the value so it's not useful so far i can
>> see. So you either need to "return findFile(full_path) " or "value =
>> findFile(full_path)"
>> 3. I am not sure of your usage of n, the way i do similiar things is
>> to build a list and then just get the item i want by index or slicing.
>>
>> ~g
>>
>> On Tue, Feb 24, 2009 at 5:28 AM, venu madhav <venutaurus...@gmail.com>
>> wrote:
>> > Hello,
>> > First of all thanks for your response. I've written a function
>> > as
>> > shown below to recurse a directory and return a file based on the value
>> > of
>> > n. I am calling this fucntion from my main code to catch that filename.
>> > The
>> > folder which it recurses through contains a folder having files with
>> > unicode
>> > names (as an example i've given earlier.
>> >
>> > -----------------------------------------------------------------------------
>> > def findFile(dir_path):
>> > for name in os.listdir(dir_path):
>> > full_path = os.path.join(dir_path, name)
>> > print full_path
>> > if os.path.isdir(full_path):
>> > findFile(full_path)
>> > else:
>> > n = n - 1
>> > if(n ==0):
>> > return full_path
>> >
>> > --------------------------------------------------------------------------------------------------
>> > The problem is in the return statement. In the
>> > function
>> > when I tried to print the file name, it is printing properly but the
>> > receiving variable is not getting populated with the file name. The
>> > below
>> > code (1st statement) shows the value of the full_path variable while the
>> > control is at the return statement. The second statement is in the main
>> > code
>> > from where the function call has been made.
>> > Once the control has reached the main procedure after executing the
>> > findFile
>> > procedure, the third statement gives the status of file variable which
>> > has
>> > type as NoneType and value as None. Now when I try to check if the path
>> > exists, it fails giving the below trace back.
>> >
>> > ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> >
>> > E:\DataSet\Unicode\UnicodeFiles_8859\001_0006_test_folder\0003testUnicode_ÍÎIÐNOKÔÕÖ×ØUÚÛÜUUßaáâãäåæicéeëeíîidnokôõö÷øuúûüuu.txt.txt
>> >
>> > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> > file = findFile(fpath)
>> >
>> > -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> > file
>> > NoneType
>> > None
>> >
>> > -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> > This is the final trace back:
>> > Traceback (most recent call last):
>> > File "C:\RecallStubFopen.py", line 268, in <module>
>> > if os.path.exists(file):
>> > File "C:\Python26\lib\genericpath.py", line 18, in exists
>> > st = os.stat(path)
>> > TypeError: coercing to Unicode: need string or buffer, NoneType found
>> >
>> > ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> > Please ask if you need any further information.
>> >
>> > Thank you,
>> > Venu
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Mon, Feb 23, 2009 at 11:32 PM, Chris Rebert <c...@rebertia.com>
>> > wrote:
>> >>
>> >> On Mon, Feb 23, 2009 at 5:51 AM, venutaurus...@gmail.com
>> >> <venutaurus...@gmail.com> wrote:
>> >> > Hi all,
>> >> > I am trying to find the attributes of afile whose name has
>> >> > non english characters one like given below. When I try to run my
>> >> > python scirpt, it fails giving out an error filename must be in
>> >> > string
>> >> > or UNICODE. When i try to copy the name of the file as a strinig, it
>> >> > (KOMODO IDE) is not allowing me to save the script saying that it
>> >> > cannot convert some of the characters in the current encoding which
>> >> > is
>> >> > Western European(CP-1252).
>> >> >
>> >> > 0010testUnicode_ėíîïðņōóôõöũøųúûüýþĸ !#$%&'()+,-.
>> >> > 0123456789;=...@abcd.txt.txt
>> >>
>> >> (1) How are you entering or retrieving that filename?
>> >> (2) Please provide the exact error and Traceback you're getting.
>> >>
>> >> Cheers,
>> >> Chris
>> >>
>> >> --
>> >> Follow the path of the Iguana...
>> >> http://rebertia.com
>> >
>> >
>> > _______________________________________________
>> > python-win32 mailing list
>> > python-win32@python.org
>> > http://mail.python.org/mailman/listinfo/python-win32
>> >
>> >
>
>
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