python 中字典（dict）合并：两个双层嵌套字典的合并

需求：存在以下两个第一层key相同的两层嵌套字典，求合并后的字典。

dic1 = {"小明": {"name": "owen", "age": 180}}
dic2 = {"小明": {"birthday": "1999-11-22", "height": 180}}

解答代码如下：

from copy import deepcopy


def merge_two_dict(dic1, dic2):
    """合并两个key相同的两层嵌套字典"""
    dic = deepcopy(dic1)
    for key in dic2.keys():
        if key in dic:
            dic[key].update(dic2[key])
    print(dic)


if __name__ == '__main__':
    dic1 = {"小明": {"name": "owen", "age": 180}}
    dic2 = {"小明": {"birthday": "1999-11-22", "height": 180}}
    merge_two_dict(dic1, dic2)

运行结果：