比较JSON中的信息，在列表中返回前几个结果

{
  "results": [
    {
      "name": "John",
      "age": 25,
      "city": "New York"
    },
    {
      "name": "Alice",
      "age": 30,
      "city": "London"
    },
    {
      "name": "Bob",
      "age": 35,
      "city": "Paris"
    }
  ]
}

import json

def compare_json(json_data, target_key, num_results):
    # 解析JSON数据
    data = json.loads(json_data)
    
    # 获取目标信息的键名
    target_keys = target_key.split('.')
    
    # 比较函数，用于根据目标信息进行排序
    def compare_func(item):
        value = item
        for key in target_keys:
            value = value.get(key)
        return value
    
    # 按照目标信息进行排序
    sorted_results = sorted(data['results'], key=compare_func)
    
    # 返回前几个结果
    return sorted_results[:num_results]

json_data = '''
{
  "results": [
    {
      "name": "John",
      "age": 25,
      "city": "New York"
    },
    {
      "name": "Alice",
      "age": 30,
      "city": "London"
    },
    {
      "name": "Bob",
      "age": 35,
      "city": "Paris"
    }
  ]
}
'''

target_key = 'age'
num_results = 2

results = compare_json(json_data, target_key, num_results)
print(results)

[
    {
        "name": "John",
        "age": 25,
        "city": "New York"
    },
    {
        "name": "Alice",
        "age": 30,
        "city": "London"
    }
]