explore2.py 文件源码

def __new__(cls, arg):  # <1>
        if isinstance(arg, abc.Mapping):
            return super().__new__(cls)  # <2>
        elif isinstance(arg, abc.MutableSequence):  # <3>
            return [cls(item) for item in arg]
        else:
            return arg
    # END EXPLORE2

    # BEGIN EXPLORE1