python如何删除嵌套字典中的key

将需要删除的多层key拼接成字符串，借助exec进行执行

#例：要删除source_data['identity']['creator_name']
source_data = {
    "identity":{
        "creator_name":"作者1、作者2",
        "create_timestamp":1655795519854,
        "item_id":"13666254776490042204",
        "platform":0,
        "publish_target":[
            1,
            2
        ]
    }
}


need_del = "source_data"
# 拼接source_data节点后的字段结构，string类型
tmp = "['identity']['creator_name']"
need_del += tmp

print(type(need_del))  # 执行结果：
print(need_del)        # 执行结果：source_data['identity']['creator_name']
# 执行删除操作
exec("del " + need_del)
print(source_data)     # 执行结果：source_data['identity']['creator_name']被删除