Tools for refactoring/obfuscation

[Javier]

I am looking for an automated tool for refactoring/obfuscation.
Something that changes names of functions, variables, or which would
merge all the functions of various modules in a single module.
The closest I have seen is http://bicyclerepair.sourceforge.net/

Does somebody know of something that can work from the command line or
simple data structures/text files?, like a python dictionary of functions
{"old":"new",...}