python script which delete unused C files in a folder

To remove unused C files in the folder.

import os

scan_dir = raw_input('Please input the dir path:') #"/home/chunxie/python_study/test"

input_files = raw_input('Please input the keep file:') #["test.c","help"]
#you can put keep files here too.
keep_files = []
input_keep_files = input_files.split(' ')

keep_files.extend(input_keep_files)

print input_files
print keep_files


for parent,dirnames,filenames in os.walk(scan_dir):
	print parent
	print dirnames
	
	delete_files = list(set(filenames) - set(keep_files))
	
	print delete_files
	for dfile in delete_files:
		if dfile[-1] == 'c':
			print "deleting..."+parent+"/"+dfile
			os.remove(parent+"/"+dfile)
			print "done"
		else:
			print "skipping none C file: "+dfile