cloudpickle.py 文件源码

def _walk_global_ops(code):
        """
        Yield (opcode, argument number) tuples for all
        global-referencing instructions in *code*.
        """
        code = getattr(code, 'co_code', b'')
        if not PY3:
            code = map(ord, code)

        n = len(code)
        i = 0
        extended_arg = 0
        while i < n:
            op = code[i]
            i += 1
            if op >= HAVE_ARGUMENT:
                oparg = code[i] + code[i + 1] * 256 + extended_arg
                extended_arg = 0
                i += 2
                if op == EXTENDED_ARG:
                    extended_arg = oparg * 65536
                if op in GLOBAL_OPS:
                    yield op, oparg