Python Method to Traverse Directories and Batch Rename Files and Directories

This article describes a method to traverse directories in Python and batch rename files and directories. Share it with everyone for reference, as follows:

#encoding=utf-8
#author: walker
#date: 2014-03-07
#summary: Traverse the specified directory deeply and change the names of subdirectories and files to lowercase
#Note, this program is only for Windows, where file (folder) names are case-insensitive
import os
import os.path
import shutil
#Read in the specified directory and convert it to an absolute path
rootdir = raw_input('root dir:\n')
rootdir = os.path.abspath(rootdir)
print('absolute root path:\n*** ' + rootdir + ' ***)
#Modify the filename first
for parent, dirnames, filenames in os.walk(rootdir):
  for filename in filenames:
    pathfile = os.path.join(parent, filename)
    pathfileLower = os.path.join(parent, filename.lower())
    if pathfile == pathfileLower:  #If the filename is already all lowercase
      continue
    print(pathfile + ' --> ' + pathfileLower)
    os.rename(pathfile, pathfileLower)
#Modify the directory name later, pay attention to the topdown parameter here.
#topdown determines the order of traversal. If topdown is True, list the directories under top first, then the directories within those directories, and so on.
#On the contrary, first list the deepest subdirectories recursively, then their sibling directories, and finally the parent directory.
# We need to modify the deep subdirectories first
for parent, dirnames, filenames in os.walk(rootdir, topdown=False):
  for dirname in dirnames:
    pathdir = os.path.join(parent, dirname)
    pathdirLower = os.path.join(parent, dirname.lower())
    if pathdir == pathdirLower: # If the folder name is already all lowercase
      continue
    print(pathdir + ' --> ' + pathdirLower)
    os.rename(pathdir, pathdirLower)

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