M1st0 wrote: > where I can find the grammar of python bytecode ? ( better if is in BCF > ).
There is no grammar for bytecodes - the are like assembly instructions. And what's BCF supposed to mean - BNF is a form for grammars, BCF I never heard of. And besides that: tell us what you're after, we might help and suggest other ways than creating/manipulating bytecode, as this is considered a implementation detail that is not supposed to work across implementations (like jython) and is subject to unannounced changes between major revisions of python. Diez -- http://mail.python.org/mailman/listinfo/python-list