How to recursively loop through a file structure and rename directories in python

Question

I would like to resursively rename directories by changing the last character to lowercase (if it is a letter)

I have done this with the help of my previous posts (sorry for the double posting and not acknowledging the answers)

This code works for Files, but how can I adapt it for directories as well?

import fnmatch
import os


def listFiles(dir):
    rootdir = dir
    for root, subFolders, files in os.walk(rootdir):
        for file in files:
            yield os.path.join(root,file)
    return


for f in listFiles(r"N:\Sonstiges\geoserver\IM_Topo\GIS\MAPTILEIMAGES_0\tiles_2"):
    if f[-5].isalpha():
        os.rename(f,f[:-5]+f[-5].lower() + ".JPG")
        print "Renamed " +  "---to---" + f[:-5]+f[-5].lower() + ".JPG"

Answer 1

The problem is that the default of os.walk is topdown. If you try to rename directories while traversing topdown, the results are unpredictable.

Try setting os.walk to go bottom up:

for root, subFolders, files in os.walk(rootdir,topdown=False):

Edit

Another problem you have is listFiles() is returning, well, files not directories.

This (untested) sub returns directories from bottom up:

def listDirs(dir):
    for root, subFolders, files in os.walk(dir, topdown=False):
        for folder in subFolders:
           yield os.path.join(root,folder)
    return