callfunc_opcode_info = {
# (Have *args, Have **args) : opcode
(0, 0) : "CALL_FUNCTION",
(1, 0) : "CALL_FUNCTION_VAR",
(0, 1) : "CALL_FUNCTION_KW",
(1, 1) : "CALL_FUNCTION_VAR_KW",
}

have_star = node.star_args is not None
have_dstar = node.dstar_args is not None

opcode = callfunc_opcode_info[have_star, have_dstar]