python手动实现深拷贝

def deepcopy(cls):

    if isinstance(cls, dict):

        dct = {}

        for k, v in cls.items():

            dct[k] = deepcopy(v)

        return dct

    elif isinstance(cls, list):

        li = []

        for item in cls:

            li.append(deepcopy(item))

        return li

    elif isinstance(cls, tuple):

        li = []

        for i in cls:

            li.append(deepcopy(i))

        return tuple(li)

    else:

        return cls

import copy

if __name__ == '__main__':

    lst = [1, 2, 3, 6, 4, ([5, 6, 8, 7, [7, 8, {"acb": 89375, "dxt": "kgfjolij", "v": 222}, 5, 4, 7]], (2,5,{"z":2}))]

    res = deepcopy(lst)

    print(res,'deep',id(res[5][0]))

    print('lst', id(lst[5][0]))

    ls = copy.copy(lst)

    print('ls', id(ls[5][0]))

#[1, 2, 3, 6, 4, ([5, 6, 8, 7, [7, 8, {'acb': 89375, 'dxt': 'kgfjolij', 'v': # 222}, 5, 4, 7]], (2, 5, {'z': 2}))] deep 42348296

# lst 42348168

# ls 42348168

def deepcopy(cls):

    if isinstance(cls, dict):

        return {k: deepcopy(v) for k, v in cls.items()}

    elif isinstance(cls, list):

        return [deepcopy(item) for item in cls]

    elif isinstance(cls, tuple):

        return tuple([deepcopy(item) for item in cls])

    else:

        return cls