Java to Python translation

[vmilitaru]

Greetings,

I am a newbie at Flex-Bison. But I need to translate a (rather voluminous 100MB)
java program to python. After a few searches on google, apparently the best 
tools for this task are Lex-Yacc (Flex-Bison on linux). While I am chewing on 
the Lex-YACC HOWTO, I would be very interested in hearing of others' successful
experiences/feedback at this. Any pointers of interest would similarily be 
appreciated (java or python grammar,etc.).

Obviously, telling me that Flex-Bison are not the right tools for my translation
task would be similarly appreciated.

Many thanks,
Vio