#! /usr/bin/env python "Replace LF with CRLF in argument files.  Print names of changed files." import sys, re, os def main():    for filename in sys.argv[1:]:        if os.path.isdir(filename):            print filename, "Directory!"            continue        data = open(filename, "rb").read()        if '\0' in data:            print filename, "Binary!"            continue        newdata = re.sub("\r?\n", "\r\n", data)        if newdata != data:            print filename            f = open(filename, "wb")            f.write(newdata)            f.close() if __name__ == '__main__':    main()