如何在python中提取嵌套json中的元素

import json

def extract_elements(data, target_key):
    if isinstance(data, dict):  # 处理字典类型
        for key, value in data.items():
            if key == target_key:
                print(value)  # 输出目标元素的值
            elif isinstance(value, (dict, list)):  # 处理嵌套的字典或列表
                extract_elements(value, target_key)
    elif isinstance(data, list):  # 处理列表类型
        for item in data:
            extract_elements(item, target_key)

# 假设有如下嵌套的JSON数据
json_data = '''
{
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Street",
        "city": "New York"
    },
    "friends": [
        {
            "name": "Alice",
            "age": 25
        },
        {
            "name": "Bob",
            "age": 35
        }
    ]
}
'''

# 将JSON字符串解析为Python对象
data = json.loads(json_data)

# 提取嵌套JSON中的元素
target_key = "name"
extract_elements(data, target_key)