如何将JSON类型的字段解嵌到一堆新字段中？

import json

# 假设有一个包含JSON字段的字符串
json_str = '{"name": "John", "age": 30, "address": {"city": "New York", "country": "USA"}}'

# 解析JSON字符串为一个字典对象
data = json.loads(json_str)

# 提取需要解嵌的子字段
name = data["name"]
age = data["age"]
city = data["address"]["city"]
country = data["address"]["country"]

# 创建新字段并赋值
new_name = name
new_age = age
new_city = city
new_country = country

# 打印新字段的值
print("Name:", new_name)
print("Age:", new_age)
print("City:", new_city)
print("Country:", new_country)