Python - 字典嵌套在字典中嵌套的列表中

Question

When I do requests.get I'm given back a response that looks like this, the data is from the LoL API:

{
"champions": [
    {
        "id": 111,
        "stats": {
            "maxChampionsKilled": 2,
            "maxNumDeaths": 5,
            "mostChampionKillsPerSession": 2,
            "mostSpellsCast": 0,
            "totalAssists": 25,
            "totalChampionKills": 2,
            "totalDamageDealt": 40838,
            "totalDamageTaken": 27900,
            "totalDeathsPerSession": 5,
            "totalDoubleKills": 0,
            "totalFirstBlood": 0,
            "totalGoldEarned": 11070,
            "totalMagicDamageDealt": 21083,
            "totalMinionKills": 56,
            "totalPentaKills": 0,
            "totalPhysicalDamageDealt": 12876,
            "totalQuadraKills": 0,
            "totalSessionsLost": 1,
            "totalSessionsPlayed": 1,
            "totalSessionsWon": 0,
            "totalTripleKills": 0,
            "totalTurretsKilled": 1,
            "totalUnrealKills": 0
        }
    },

I'm struggling getting the data that is inside of "stats." What I really want to do is is something similar to the following:

champ_data = received['champions']['stats']['totalSessionsPlayed']
print(champ_data)

However it isn't working because after "champions" there is a '[' and I get the error:

TypeError: list indices must be integers, not str

Answer 1

You want this

received['champions'][0]['stats']

for the first champion's stats. Or, this

received['champions'][n]['stats']

for the nth champion's stats. Or, this

[champion['stats'] for champion in received['champions']]

for a list of each champion's stats.

Answer 2

received['champions'] is a list. To process all entries (if that's what you want to do) you have to iterate it:

for champion in received['champions']:
    print(champion['stats']['totalSessionsPlayed'])

Answer 3

此外，如果属性champions为空，请对您收到的数据对象进行一些检查。

Answer 4

In your example 'champion' is a list with one element. This list element can be accessed by champion[0]. This list's element is a dictionary with 2 key:value pairs. 'stats' is a key of 2nd pair which can be accessed by champion[0]['stats']. Again the value of 'stats' key is a dictionary, whose any key's value eg value of 'totalSessionsPlayed' can be accessed by champion[0]['stats']['totalSessionsPlayed']