py21compat.py 文件源码

def isinstance(obj, t):
        if not __builtin__.isinstance(t, type(())):
            # t is not a tuple
            return __builtin__.isinstance(obj, _builtin_type_map.get(t, t))
        else:
            # t is a tuple
            for typ in t:
                if __builtin__.isinstance(obj, _builtin_type_map.get(typ, typ)):
                    return True
            return False

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