[Tutor] select particular directories and files

[Peter Otten]

questions anon wrote:

> I am trying to select particular files within a particular subdirectory, I
> have been able to do both but not together!
> When I try to select my files within the dir loop nothing comes up, but
> when I leave the files outside the dir loops it selects all the files
> not just the ones in the dirs I have selected.
> The code I am using is:
> 
> import os
> 
> MainFolder=r"D:/samples/"
> 
> for (path, dirs, files) in os.walk(MainFolder):
>     for dir in dirs:

dirs contains the names of subdirectories of the directory you are currently 
processing, but you are interested in the parent directory which you get 
with with os.path.basename(path)

>         if dir=='01':
>             print "selected directories are:",dir
> 
>             for ncfile in dir:
>                   if ncfile[-3:]=='.nc':
>                         print "ncfiles are:", ncfile
> 
> Any feedback will be greatly appreciated!!

import os

mainfolder = "d:/samples"
foldername = "01"
fileext = ".nc"

for path, folders, files in os.walk(mainfolder):
    if os.path.basename(path) == foldername:
        for file in files:
            if file.endswith(fileext):
                print os.path.join(path, file)