This is a Python script to walk a directory tree, renaming .jpg and .JPG files. It was written for a client who had a directory containing multiple directories, each containing zero or more (up to 100) image files. Most of the images were named <abitrary name 1>.jpg or <arbitrary name 2>.JPG.
The client wanted each folder’s images to be numbered 001.jpg to nnn.jpg for some further process.
import os import imghdr def renamefiles(path): rootstructure=os.path.abspath(path) n = 0 for root, dirs, files in os.walk(rootstructure): for f in files: if os.getcwd() != root: n = 0 # Reset the counter os.chdir(root) type = imghdr.what(f) if type == 'jpeg': n +=1 os.rename(f, str(n).zfill(3) + ".jpg") # Specify the full path to the directory here. renamefiles("/Users/myuser/Desktop/TheImageFolder")</pre>