从 API 解析 JSON 时出现 KeyError

Question

我需要从 API 请求的 JSON 文件中解析数据。 API 文档提供了如何实现它的示例代码，但是他们的方法会导致以下 KeyError：

Traceback (most recent call last):
  File "testing2.py", line 11, in <module>
    for flight in api_response['results']:
KeyError: 'results'

我花了很多时间寻找可能的原因，但找不到适合我的解决方案。 Python 文件如下所示：

import requests

params = {
  'access_key': my_access_key'
}

results = requests.get('http://api.aviationstack.com/v1/flights?access_key=my_access_key&airline_name=Air%20India&flight_number=560')

api_response = results.json()

for flight in api_response['results']:
    if (flight['live']['is_ground'] is False):
        print(u'%s flight %s from %s (%s) to %s (%s) is in the air.' % (
            flight['airline']['name'],
            flight['flight']['iata'],
            flight['departure']['airport'],
            flight['departure']['iata'],
            flight['arrival']['airport'],
            flight['arrival']['iata']))

我已经能够使用print(api_response) 读取数据，但是我无法解析其中的任何一个，因为关键的“结果”似乎根本不存在。

编辑：

这是直接转到 URL 或 print(api_response) 的结果，一大块文本：

{"分页":{"limit":100,"offset":0,"count":4,"total":4},"data":[{"flight_date":"2020-09-02 ","flight_status":"landed","departure":{"airport":"Indira Gandhi International","timezone":"Asia/Kolkata","iata":"DEL","icao":"VIDP" ,"终端":"3","门":"33","延迟":4,"预定":"2020-09-02T07:15:00+00:00","估计":"2020- 09-02T07:15:00+00:00","实际":"2020-09-02T07:18:00+00:00","estimated_runway":"2020-09-02T07:18:00+00: 00","actual_runway":"2020-09-02T07:18:00+00:00"},"arrival":{"airport":"Hyderabad Airport","timezone":"Asia/Kolkata","iata ":"HYD","icao":"VOHS","terminal":"1","gate":null,"baggage":null,"delay":2,"scheduled":"2020-09-02T09 :10:00+00:00","估计":"2020-09-02T09:10:00+00:00","实际":"2020-09-02T09:09:00+00:00", "estimated_runway":"2020-09-02T09:09:00+00:00","actual_runway":"2020-09-02T09:09:00+00:00"},"航空公司":{"name": "印度航空","iata":"AI","icao":"AIC"},"flight":{"number":"560","iata":"AI560","icao":"AIC560" ,"代码共享":null},"飞机":{"注册":"VT-EXM","ia ta":"A20N","icao":"A20N","icao24":"800C4B"},"live":null},{"flight_date":"2020-09-01","flight_status":"登陆","departure":{"airport":"Tirupati","timezone":"Asia/Kolkata","iata":"TIR","icao":"VOTP","terminal":null,"gate" :null,"delay":null,"scheduled":"2020-09-01T10:20:00+00:00","估计":"2020-09-01T10:20:00+00:00","实际":"2020-09-01T10:06:00+00:00","estimated_runway":"2020-09-01T10:06:00+00:00","actual_runway":"2020-09-01T10: 06:00+00:00"},"arrival":{"airport":"Hyderabad Airport","timezone":"Asia/Kolkata","iata":"HYD","icao":"VOHS", "终端":"3","登机口":null,"行李":null,"延迟":null,"预定":"2020-09-01T11:40:00+00:00","估计": "2020-09-01T11:40:00+00:00","实际":"2020-09-01T10:51:00+00:00","estimated_runway":"2020-09-01T10:51:00 +00:00","actual_runway":"2020-09-01T10:51:00+00:00"},"airline":{"name":"印度航空","iata":"AI"," icao":"AIC"},"flight":{"number":"560","iata":"AI560","icao":"AIC560","codeshared":null},"aircraft":null, "live":null},{"flight_date":"2020-09-01","flight _status":"landed","departure":{"airport":"Indira Gandhi International","timezone":"Asia/Kolkata","iata":"DEL","icao":"VIDP","terminal ":"3","gate":"29B","delay":6,"scheduled":"2020-09-01T06:50:00+00:00","estimated":"2020-09-01T06 :50:00+00:00","实际":"2020-09-01T06:56:00+00:00","estimated_runway":"2020-09-01T06:56:00+00:00", "actual_runway":"2020-09-01T06:56:00+00:00"},"arrival":{"airport":"Hyderabad Airport","timezone":"Asia/Kolkata","iata":" HYD","icao":"VOHS","terminal":"2","gate":null,"baggage":null,"delay":null,"scheduled":"2020-09-01T09:20: 00+00:00","估计":"2020-09-01T09:20:00+00:00","实际":null,"estimated_runway":null,"actual_runway":null},"航空公司": {"name":"印度航空","iata":"AI","icao":"AIC"},"flight":{"number":"560","iata":"AI560","icao ":"AIC560","codeshared":null},"aircraft":{"registration":"VT-EXM","iata":"A20N","icao":"A20N","icao24":"800C4B "},"live":null},{"flight_date":"2020-09-01","flight_status":"landed","departure":{"airport":"Hyderabad Airport","timezone":"亚洲/加尔各答","iata":"HYD","icao":"VOHS","terminal":null,"gate":null,"delay":null,"scheduled":"2020-09-01T12:45: 00+00:00","估计":"2020-09-01T12:45:00+00:00","实际":"2020-09-01T12:41:00+00:00","estimated_runway" :"2020-09-01T12:41:00+00:00","actual_runway":"2020-09-01T12:41:00+00:00"},"到达":{"机场":"英迪拉·甘地International","timezone":"Asia/Kolkata","iata":"DEL","icao":"VIDP","terminal":"3","gate":null,"baggage":null,"延迟":null,"预定":"2020-09-01T14:55:00+00:00","估计":"2020-09-01T14:55:00+00:00","实际":" 2020-09-01T14:42:00+00:00","estimated_runway":"2020-09-01T14:42:00+00:00","actual_runway":"2020-09-01T14:42:00+ 00:00"},"airline":{"name":"印度航空","iata":"AI","icao":"AIC"},"flight":{"number":"560", "iata":"AI560","icao":"AIC560","codeshared":null},"aircraft":null,"live":null}]}

Answer 1

试试这个。它访问键 data 而不是键 results （响应中可能不存在），并且在访问飞行对象中的 live 键时不会引发 TypeError，这可能为 null （当它在地面上时）。

import requests

params = {
  'access_key': access_key,
  'airline_name': 'Air India',
  'flight_number': 560
}


results = requests.get('http://api.aviationstack.com/v1/flights', params=params)

api_response = results.json()

for flight in api_response['data']:
    if flight.get('live') and not flight['live']['is_ground']:
        print('{} flight {} from {} ({}) to {} ({}) is in the air.'.format(
            flight['airline']['name'],
            flight['flight']['iata'],
            flight['departure']['airport'],
            flight['departure']['iata'],
            flight['arrival']['airport'],
            flight['arrival']['iata']))
    else:
        print("All flights landed.")