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-1

属性的值排序JSON我有以下的JSON文件通过使用Python

{ 
    "modifyDate": 1463899037000, 
    "champions": [ 
     { 
     "id": 40, 
     "stats": { 
      "totalDeathsPerSession": 60, 
      "totalSessionsPlayed": 18, 
      "totalDamageTaken": 246343, 
      "totalQuadraKills": 0, 
      "totalTripleKills": 0, 
      "totalMinionKills": 272, 
      "maxChampionsKilled": 3, 
      "totalDoubleKills": 0, 
      "totalPhysicalDamageDealt": 121345, 
      "totalChampionKills": 11, 
      "totalAssists": 271, 
      "mostChampionKillsPerSession": 3, 
      "totalDamageDealt": 238803, 
      "totalFirstBlood": 0, 
      "totalSessionsLost": 7, 
      "totalSessionsWon": 11, 
      "totalMagicDamageDealt": 113241, 
      "totalGoldEarned": 176088, 
      "totalPentaKills": 0, 
      "totalTurretsKilled": 10, 
      "mostSpellsCast": 0, 
      "maxNumDeaths": 9, 
      "totalUnrealKills": 0 
     } 
     }, 
     { 
     "id": 111, 
     "stats": { 
      "totalDeathsPerSession": 20, 
      "totalSessionsPlayed": 4, 
      "totalDamageTaken": 60371, 
      "totalQuadraKills": 0, 
      "totalTripleKills": 0, 
      "totalMinionKills": 247, 
      "maxChampionsKilled": 3, 
      "totalDoubleKills": 0, 
      "totalPhysicalDamageDealt": 35727, 
      "totalChampionKills": 4, 
      "totalAssists": 35, 
      "mostChampionKillsPerSession": 3, 
      "totalDamageDealt": 190815, 
      "totalFirstBlood": 0, 
      "totalSessionsLost": 2, 
      "totalSessionsWon": 2, 
      "totalMagicDamageDealt": 145353, 
      "totalGoldEarned": 30823, 
      "totalPentaKills": 0, 
      "totalTurretsKilled": 2, 
      "mostSpellsCast": 0, 
      "maxNumDeaths": 7, 
      "totalUnrealKills": 0 
     } 
     }, 
     { 
     "id": 43, 
     "stats": { 
      "totalDeathsPerSession": 103, 
      "totalSessionsPlayed": 24, 
      "totalDamageTaken": 335867, 
      "totalQuadraKills": 0, 
      "totalTripleKills": 0, 
      "totalMinionKills": 828, 
      "maxChampionsKilled": 10, 
      "totalDoubleKills": 2, 
      "totalPhysicalDamageDealt": 170141, 
      "totalChampionKills": 77, 
      "totalAssists": 302, 
      "mostChampionKillsPerSession": 10, 
      "totalDamageDealt": 923985, 
      "totalFirstBlood": 0, 
      "totalSessionsLost": 7, 
      "totalSessionsWon": 17, 
      "totalMagicDamageDealt": 732367, 
      "totalGoldEarned": 242157, 
      "totalPentaKills": 0, 
      "totalTurretsKilled": 12, 
      "mostSpellsCast": 0, 
      "maxNumDeaths": 8, 
      "totalUnrealKills": 0 
     } 
     }, 
     { 
     "id": 117, 
     "stats": { 
      "totalDeathsPerSession": 150, 
      "totalSessionsPlayed": 36, 
      "totalDamageTaken": 494142, 
      "totalQuadraKills": 0, 
      "totalTripleKills": 0, 
      "totalMinionKills": 2017, 
      "maxChampionsKilled": 8, 
      "totalDoubleKills": 5, 
      "totalPhysicalDamageDealt": 297987, 
      "totalChampionKills": 102, 
      "totalAssists": 418, 
      "mostChampionKillsPerSession": 8, 
      "totalDamageDealt": 1905782, 
      "totalFirstBlood": 0, 
      "totalSessionsLost": 13, 
      "totalSessionsWon": 23, 
      "totalMagicDamageDealt": 1577943, 
      "totalGoldEarned": 353798, 
      "totalPentaKills": 0, 
      "totalTurretsKilled": 15, 
      "mostSpellsCast": 0, 
      "maxNumDeaths": 12, 
      "totalUnrealKills": 0 
     } 
     }, 
     { 
     "id": 254, 
     "stats": { 
      "totalDeathsPerSession": 13, 
      "totalSessionsPlayed": 2, 
      "totalDamageTaken": 43839, 
      "totalQuadraKills": 0, 
      "totalTripleKills": 0, 
      "totalMinionKills": 77, 
      "maxChampionsKilled": 8, 
      "totalDoubleKills": 0, 
      "totalPhysicalDamageDealt": 227018, 
      "totalChampionKills": 12, 
      "totalAssists": 8, 
      "mostChampionKillsPerSession": 8, 
      "totalDamageDealt": 247686, 
      "totalFirstBlood": 0, 
      "totalSessionsLost": 1, 
      "totalSessionsWon": 1, 
      "totalMagicDamageDealt": 3920, 
      "totalGoldEarned": 21321, 
      "totalPentaKills": 0, 
      "totalTurretsKilled": 0, 
      "mostSpellsCast": 0, 
      "maxNumDeaths": 9, 
      "totalUnrealKills": 0 
     } 
     } 
    ], 
    "summonerId": 21193669 
}

，我想要得到的id S的3 champions拥有最totalSessionsPlayed。要做到这一点，我首先排序championstotalSessionsPlayed，然后取第一个3 id s。我该怎么做，或者有没有更好的方法来做到这一点，而不是先排序呢？

来源

2016-05-22 user5368737

除了使用'sorted（）'？ –

你能粘贴你试图提取的值和你的逻辑代码，而不仅仅是JSON吗？ – glls

而不是'sorted（）'，你可以在这里使用'heapq.nlargest（）'，但是我没有看到一个点。 –

如果我理解这个问题的权利，你可以使用heapq.nlargest到partially sort您的数组：

import json 
import heapq 

dat = json.loads("(your json here)") 
champions = dat['champions'] 
tsp_getter = lambda x: x['stats']['totalSessionsPlayed'] 
largest = heapq.nlargest(3, champions, key = tsp_getter) 
ids = [c['id'] for c in largest]

，不过也许简单sorted将起到代替nlargest不错（你可以做你的基准测试，以检查它）：

tsp_getter = lambda x: - x['stats']['totalSessionsPlayed'] 
largest = sorted(champions, key = tsp_getter) 
ids = [c['id'] for c in largest[:3]]

来源

2016-05-22 19:41:32

通过使用Python

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