code: def remove_input(urls, preserves, verbose = False):
  	
  	for path in map(url2path, urls):
  		if any(os.path.samefile(path, preserve) for preserve in preserves):
  			continue
  		if verbose:
  			print >>sys.stderr, "removing \"%s\" ..." % path
  		try:
  			os.remove(path)
  		except:
  			pass
docs: Attempt to delete all files identified by the URLs in urls except
  	any that are the same as the files in the preserves list.