我对python中的请求做了什么错误：ValueError:期望值：行1列1（char 0）？

Question

我甚至不知道该如何提问，因为这似乎需要大量代码才能了解细节。我将讨论运行时的行为，而不是显示代码。在

我使用请求从一个在线数据库获取信息。当我运行for循环遍历我的所有条目时，在前20个条目中的一个（通常是第一个条目，但不一定总是）出现如下错误。列表中的条目都是一样的（只是不同的ID号）。我使用sleep（）来确保不会超出速率限制（我尝试将睡眠时间增加到荒谬的等待时间，但仍然得到错误）。真正让我吃惊的是，它确实起了作用，然后就卡住了。。。。是什么原因造成的？在

另外，代码之前还在工作，然后我对同一文件中的其他代码进行了大量编辑，但我认为我没有编辑任何与此相关的内容。在

Traceback (most recent call last):
File "C:/Users/Mark/PycharmProjects/Riot_API_Challenger_Stats/Main.py", line 233, in <module>
main()
File "C:/Users/Mark/PycharmProjects/Riot_API_Challenger_Stats/Main.py", line 212, in main
match_histories=get_match_histories(challenger_Ids+master_Ids)
File "C:/Users/Mark/PycharmProjects/Riot_API_Challenger_Stats/Main.py", line 62, in get_match_histories
match_histories[summoner_Ids[i]]=api.get_match_history_data(summoner_Ids[i])
File "C:\Users\Mark\PycharmProjects\Riot_API_Challenger_Stats\RiotAPI.py", line 52, in get_match_history_data
return self._request(api_url)
File "C:\Users\Mark\PycharmProjects\Riot_API_Challenger_Stats\RiotAPI.py", line 25, in _request
return response.json()
File "C:\Users\Mark\Anaconda3\lib\site-packages\requests\models.py", line 819, in json
return json.loads(self.text, **kwargs)
File "C:\Users\Mark\Anaconda3\lib\json\__init__.py", line 318, in loads
return _default_decoder.decode(s)
File "C:\Users\Mark\Anaconda3\lib\json\decoder.py", line 343, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\Users\Mark\Anaconda3\lib\json\decoder.py", line 361, in raw_decode
raise ValueError(errmsg("Expecting value", s, err.value)) from None
ValueError: Expecting value: line 1 column 1 (char 0)

这是里奥塔皮的10-25号线

^{pr2}$

回复如下：

{"matches":[{"matchId":1878534497,"region":"NA","platformId":"NA1","matchMode":"CLASSIC","matchType":"MATCHED_GAME","matchCreation":1436223958539,"matchDuration":2097,"queueType":"RANKED_SOLO_5x5","mapId":11,"season":"SEASON2015","matchVersion":"5.12.0.348","participants":[{"teamId":200,"spell1Id":4,"spell2Id":7,"championId":15,"highestAchievedSeasonTier":"UNRANKED","timeline":{"creepsPerMinDeltas":{"zeroToTen":5.699999999999999,"tenToTwenty":6.9,"twentyToThirty":7.1},"xpPerMinDeltas":{"zeroToTen":358.5,"tenToTwenty":350.0,"twentyToThirty":364.20000000000005},"goldPerMinDeltas":{"zeroToTen":365.3,"tenToTwenty":337.5,"twentyToThirty":287.5},"csDiffPerMinDeltas":{"zeroToTen":-0.7,"tenToTwenty":-1.7000000000000004,"twentyToThirty":1.0999999999999999},"xpDiffPerMinDeltas":{"zeroToTen":-0.9000000000000057,"tenToTwenty":-114.75,"twentyToThirty":-121.19999999999999},"damageTakenPerMinDeltas":{"zeroToTen":480.5,"tenToTwenty":565.3,"twentyToThirty":1258.6},"damageTakenDiffPerMinDeltas":{"zeroToTen":-147.49999999999994,"tenToTwenty":-134.69999999999996,"twentyToThirty":15.0},"role":"DUO_CARRY","lane":"BOTTOM"},"masteries":[{"masteryId":4112,"rank":4},{"masteryId":4114,"rank":1},{"masteryId":4122,"rank":3},{"masteryId":4124,"rank":1},{"masteryId":4132,"rank":1},{"masteryId":4134,"rank":3},{"masteryId":4142,"rank":2},{"masteryId":4144,"rank":1},{"masteryId":4151,"rank":1},{"masteryId":4152,"rank":3},{"masteryId":4162,"rank":1},{"masteryId":4211,"rank":2},{"masteryId":4212,"rank":2},{"masteryId":4221,"rank":1},{"masteryId":4222,"rank":3},{"masteryId":4232,"rank":1}],"stats":{"winner":false,"champLevel":14,"item0":3031,"item1":0,"item2":3142,"item3":3035,"item4":1053,"item5":3250,"item6":3342,"kills":4,"doubleKills":1,"tripleKills":0,"quadraKills":0,"pentaKills":0,"unrealKills":0,"largestKillingSpree":3,"deaths":12,"assists":5,"totalDamageDealt":184710,"totalDamageDealtToChampions":27477,"totalDamageTaken":30740,"largestCriticalStrike":684,"totalHeal":2952,"minionsKilled":237,"neutralMinionsKilled":1,"neutralMinionsKilledTeamJungle":1,"neutralMinionsKilledEnemyJungle":0,"goldEarned":12074,"goldSpent":12065,"combatPlayerScore":0.....etc.}}]}]}

Answer 1

如果你能把实际代码贴出来就好了。但是，如果您由于机密原因无法这样做，我们可以从堆栈跟踪中推测出一些信息。在

您正在使用一些HTTP协议（SOAP/ResT）API来获取JSON格式的数字（或一系列数字）。其中一个ID号包含不需要的字符，或者JSON本身无效。在传递JSON请求之前，请尝试打印它，以查看哪个请求失败。然后创建一个单元测试并运行它，尝试用断点分析它。在

可能是基于数据库的某种连字符或外来字符。在

Answer 2

如果您可以包含一段代码片段来查看您实际是如何使用它的，这会很有帮助。在

不过，从例外情况来看，我想你是想

return response.json()

在C:\Users\Mark\PycharmProjects\Riot_API_Challenger_Stats的第25行\里奥塔皮.py 但是响应不是JSON格式的。在

您可以通过

^{pr2}$

查看响应的字符串版本并检查字符串是否为JSON格式。在