在调用API后，我要提取特定的键/值，然后将其保存到文本文件中。

到目前为止已经做了什么： （1）Rest api调用和返回列表

import requests
import json

#API details
url = "http://192.168.1.100:9792/api/scan"
body = json.dumps({"service":"scan","user_id":"1","action":"read_all","code":"0"})
headers = {'Content-Type': 'application/json'}

#Making http post request
response = requests.post(url,headers=headers,data=body,verify=False)

#Decode response.json() method to a python dictionary for data process utilization
dictData = response.json()

#Json string
json_str = json.dumps(dictData)
print(json_str)

print（json_str）输出如下

{
  "node": [
    {
      "id": "123","ip": "10.101.10.1","model": "md1","type": "basic","name": "aaa"
    },{
      "id": "456","ip": "10.101.10.2","model": "sp3","type": "extra","name": "bbb"
    },{
      "id": "789","ip": "1.1.1.1","name": "ccc"
    },{
      "id": "101","ip": "2.2.2.2","model": "advance","type": "sw1","name": "ddd"
    }
  ],"status": "success"
}

（2）提取特定的键/值，这是我从列表中获取键/值时出错的地方

for i in json_str["node"]:
   if i["type"]=="basic" or i["type"]=="sw1" :
      print(i["name"],i["ip"],i["type"])

我遇到错误

for i in json_str["node"]:
TypeError: string indices must be integers,not str

我尝试更改为json_str [0]，但它仍未返回我想要的键/值。 请进一步协助。谢谢

只需使用字典数据中已有的dictData

for i in dictData["node"]