I read the comment of http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277753. (Title : Find and replace string in all files in a directory)
"perl -p -i -e 's/change this/..to this/g'" trick looks handy. Does Python have a similar trick? Or, is there a shorter Python recipe for the given problem? -- http://mail.python.org/mailman/listinfo/python-list