如何通过键从超级嵌套Json中获取值

{
  "key1": {
    "key2": {
      "key3": "value"
    }
  }
}

import json

def get_value_from_nested_json(json_str, target_key):
    try:
        json_obj = json.loads(json_str)
        keys = target_key.split('.')
        value = json_obj
        for key in keys:
            value = value[key]
        return value
    except (KeyError, TypeError):
        return None

# 示例JSON字符串
json_str = '''
{
  "data": {
    "users": [
      {
        "name": "Alice",
        "age": 25
      },
      {
        "name": "Bob",
        "age": 30
      }
    ]
  }
}
'''

# 获取"name"键对应的值
name = get_value_from_nested_json(json_str, 'data.users.0.name')
print(name)  # 输出: Alice

# 获取"age"键对应的值
age = get_value_from_nested_json(json_str, 'data.users.1.age')
print(age)  # 输出: 30