Python script to replace underscores with spaces

rename_files.py

#!/usr/bin/python
# Usage: python rename_files.py "C:\Directory of Files with Underscores"

import os
import sys

directory = sys.argv[1] # parse through file list in the current directory

for filename in os.listdir(directory): # parse through file list in the current directory

	if filename.find("_") > 0: # if an underscore is found

		newfilename = filename.replace("_"," ") # convert underscores to space's

		newfilename.lower() # convert to lower case

		os.rename(filename, newfilename) # rename the file

Thanks for this. Your second last line doesn't convert to lowercase: you need:

newfilename = newfilename.lower()

Otherwise you're just sending the lower case value to stdout.
I use the following to give first char as caps:

newNewfilename = newfilename[0].upper() + newfilename[1:].lower()