如何使用python計算json響應中的值出現次數？

Question

我有一個如下所示的 json 響應，我想計算corrId被提及的次數。

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

對於上述，我希望結果是3

我已經嘗試過類似上面的方法，但它會引發錯誤：

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

我的錯誤：

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

有人可以幫忙嗎？ 提前致謝！

Answer 1

您需要實際計算具有該鍵的dict的數量：

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))

輸出 3