It is so cool to be able to get the disassembly so easily.... thanks v. much Terry. Cheers, John > >>> import dis > >>> dis.dis(ldel) > 0 SET_LINENO 1 > > 3 SET_LINENO 2 > 6 LOAD_FAST 0 (lisp) > 9 LOAD_FAST 1 (index) > 12 DELETE_SUBSCR > 13 LOAD_CONST 0 (None) > 16 RETURN_VALUE