如何使用python计算json响应中的值出现？

Question

我有一个如下所示的 json 响应，我想计算corrId 被提及的次数。

{
  "result":
    {
      "corrList":[
        {
          "corrId":123456,
          "title":"sample1",
        },
        {
          "corrId":45678,
          "title":"sample2",
        },
        {
          "corrId":987654,
          "title":"sample3",
        }
      ],
      "find":true
    }
}

对于上述情况，我希望结果是3

我已经尝试过类似上面的方法，但它会引发错误：

r = requests.get(url = HOSTNAME + endpoint, headers = headers, verify=False)
data = json.loads(r.text)
corrList = len(data['corrList'][0]['corrId'])
print (corrList)

我的错误：

TypeError: object of type 'int' has no len()

有人可以帮忙吗？提前致谢！

Answer 1

您需要实际计算拥有该密钥的dicts 的数量：

data = {
  "result":
    {
      "corrList":[
        {
          "corrId":123456,
          "title":"sample1",
        },
        {
          "corrId":45678,
          "title":"sample2",
        },
        {
          "corrId":987654,
          "title":"sample3",
        }
      ],
      "find":True
    }
}

corrList = [item for item in data['result']['corrList'] if 'corrId' in item]
print(len(corrList))

输出 3