如何获取json中一个键的所有值，而不仅仅是最后一个组？

Question

for循环只输出json文件最后一组种族的ID。我认为这是因为for循环前面的if语句。有人知道我如何在保持if语句的同时继续循环吗

我的代码：

request1 = requests.get('https://betfair-data-supplier-prod.herokuapp.com/api/daily_racing_results?date=2020-01-02')
json1 = request1.json()
marketids = []
for market in json1:
    if market['raceType'] in ['R']:
        marketids.append(market["markets"][0]["marketId"])
print(marketids)

代码输出：

['166897895', '166892549', '166896013', '166892651', '166892683', '166897912']

json1的示例：

[{'venueName': 'Geelong',
  'raceDay': '2020-01-02 00:00:00',
  'country': 'AUS',
  'raceType': 'R',
  'meetingId': '29637049',
  'markets': [{'marketId': '166897895',
    'raceNo': '1',
    'startTime': '2020-01-02 02:00:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Port Water Bouy Mdn Plate',
    'nzToteEventId': '287012'},
   {'marketId': '166897897',
    'raceNo': '2',
    'startTime': '2020-01-02 02:30:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Portarlington Beach Motel Mdn',
    'nzToteEventId': '287013'},
   {'marketId': '166897899',
    'raceNo': '3',
    'startTime': '2020-01-02 03:00:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Flash Fabrications Mdn Plat3',
    'nzToteEventId': '287014'},
   {'marketId': '166897901',
    'raceNo': '4',
    'startTime': '2020-01-02 03:30:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Race With Empower Racing Mdn',
    'nzToteEventId': '287015'},
   {'marketId': '166897903',
    'raceNo': '5',
    'startTime': '2020-01-02 04:00:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Absolute Landscapes Mdn Plate',
    'nzToteEventId': '287016'},
   {'marketId': '166897905',
    'raceNo': '6',
    'startTime': '2020-01-02 04:30:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Ajk Builders (Bm64)',
    'nzToteEventId': '287017'},
   {'marketId': '166933411',
    'raceNo': '7',
    'startTime': '2020-01-02 05:00:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Batman Mgmt Bellarine Cup-Bm64',
    'nzToteEventId': '287018'},
   {'marketId': '166897909',
    'raceNo': '8',
    'startTime': '2020-01-02 05:30:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Gj Bradding Heating&Cool.-Bm58',
    'nzToteEventId': '287019'},
   {'marketId': '166897911',
    'raceNo': '9',
    'startTime': '2020-01-02 06:00:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Bayshore Electrical (Bm58)',
    'nzToteEventId': '287020'}]},
 {'venueName': 'Mount Barker',
  'raceDay': '2020-01-02 00:00:00',
  'country': 'AUS',
  'raceType': 'R',
  'meetingId': '29636945',
  'markets': [{'marketId': '166892549',
    'raceNo': '1',
    'startTime': '2020-01-02 05:17:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Happy New Year Mdn',
    'nzToteEventId': ''},
   {'marketId': '166892551',
    'raceNo': '2',
    'startTime': '2020-01-02 05:52:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Langton Mdn',
    'nzToteEventId': ''},
   {'marketId': '166892553',
    'raceNo': '3',
    'startTime': '2020-01-02 06:32:00',
    'marketStatus': 'CLOSED',
    'eventName': 'McDonald Hcp (C2)',
    'nzToteEventId': ''},
   {'marketId': '166892555',
    'raceNo': '4',
    'startTime': '2020-01-02 07:10:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Hicks Hcp (C2)',
    'nzToteEventId': ''},
   {'marketId': '166892557',
    'raceNo': '5',
    'startTime': '2020-01-02 07:45:00',
    'marketStatus': 'CLOSED',
    'eventName': 'Lowood (Bm58+)',
    'nzToteEventId': ''}]}]

Answer 1

request1 = requests.get('https://betfair-data-supplier-prod.herokuapp.com/api/daily_racing_results?date=2020-01-02')
json1 = request1.json()
marketids = []
for market in json1:
    if market['raceType'] in ['R']:
        for id in market['markets']:
            marketids.append(market["markets"][id]["marketId"])
print(marketids)

通过@Sushanth编辑解决方案

[i['marketId'] for v in request1.json() if v['raceType'] == 'R' for i in v['markets']]