Python字典解析复杂问题：嵌套字典和多层键值对？-向日葵屋

Python字典解析复杂问题：嵌套字典和多层键值对？

在Python中处理嵌套字典和多层键值对非常直接且灵活。以下是一些基本的操作和例子：

访问键值对：

nested_dict = {
    "person1": {"name": "Alice", "age": 30},
    "person2": {"name": "Bob", "age": 40}
  }
# 获取单个人的信息
person_info = nested_dict["person1"]
print("Name:", person_info["name"])
print("Age:", person_info["age"])
# 获取所有人的信息列表
all_persons = nested_dict.values()
for person in all_persons:
    print("Person Name:", person["name"])
    print("Person Age:", person["age"])

添加新的键值对：

nested_dict = {
    "person1": {"name": "Alice", "age": 30},
    "person2": {"name": "Bob", "age": 40}
  }
# 在person2的下添加新信息
new_person_info = {"address": "New York", "job": "Engineer"}
nested_dict["person2"].update(new_person_info)
print(nested_dict)

删除键值对：

nested_dict = {
    "person1": {"name": "Alice", "age": 30},
    "person2": {"name": "Bob", "age": 40}
  }
# 删除person2中的新信息
del nested_dict["person2"]["address"] 
print(nested_dict)