[英]Iterate through nested JSON in Python
js = {
"status": "ok",
"meta": {
"count": 1
},
"data": {
"542250529": [
{
"all": {
"spotted": 438,
"battles_on_stunning_vehicles": 0,
"avg_damage_blocked": 39.4,
"capture_points": 40,
"explosion_hits": 0,
"piercings": 3519,
"xp": 376586,
"survived_battles": 136,
"dropped_capture_points": 382,
"damage_dealt": 783555,
"hits_percents": 74,
"draws": 2,
"battles": 290,
"damage_received": 330011,
"frags": 584,
"stun_number": 0,
"direct_hits_received": 1164,
"stun_assisted_damage": 0,
"hits": 4320,
"battle_avg_xp": 1299,
"wins": 202,
"losses": 86,
"piercings_received": 1004,
"no_damage_direct_hits_received": 103,
"shots": 5857,
"explosion_hits_received": 135,
"tanking_factor": 0.04
}
}
]
}
}
Let us name this json "js" as a variable, this variable will be in a for-loop.让我们将此 json 命名为“js”作为变量,该变量将在 for 循环中。 To understand better what I'm doing here, I'm trying to collect data from a game.
为了更好地理解我在这里所做的事情,我正在尝试从游戏中收集数据。 This game has hundreds of different tanks, each tank has tank_id with which I can post tank_id to the game server and respond the performance data as "js".
这个游戏有数百个不同的坦克,每个坦克都有 tank_id,我可以将 tank_id 发布到游戏服务器并将性能数据响应为“js”。
for tank_id: json = requests.post(tank_id) etc...
and fetch all these values to my database as shown in the screenshot. for tank_id: json = requests.post(tank_id) etc...
并将所有这些值提取到我的数据库中,如屏幕截图所示。
my python code for it:我的 python 代码:
def api_get():
for property in js['data']['542250529']['all']:
spotted = property['spotted']
battles_on_stunning_vehicles = property['battles_on_stunning_vehicles']
# etc
# ...
insert_to_db(spotted, battles_on_stunning_vehicles, etc....)
the exception is:例外是:
for property in js['data']['542250529']['all']:
TypeError: list indices must be integers or slices, not str
and when:什么时候:
print(js['data']['542250529'])
i get the rest of the js as a string, and i can't iterate... can't be used a valid json string, also what's inside js['data']['542250529'] is a list containing only the item 'all'..., any help would be appreciated我得到 js 的 rest 作为字符串,我无法迭代...项目'所有'......,任何帮助将不胜感激
You just missed [0]
to get the first item in a list:您只是错过了
[0]
以获取列表中的第一项:
def api_get():
for property in js['data']['542250529'][0]['all']:
spotted = property['spotted']
# ...
Look carefully at the data structure in the source JSON.仔细查看源码 JSON 中的数据结构。
There is a list containing the dictionary with a key of all
.有一个包含字典的列表,其键为
all
。 So you need to use js['data']['542250529'][0]['all']
not js['data']['542250529']['all']
.所以你需要使用
js['data']['542250529'][0]['all']
而不是js['data']['542250529']['all']
。 Then you can use .items()
to get the key-value pairs.然后您可以使用
.items()
来获取键值对。
See below.见下文。
js = {
"status": "ok",
"meta": {
"count": 1
},
"data": {
"542250529": [
{
"all": {
"spotted": 438,
"battles_on_stunning_vehicles": 0,
"avg_damage_blocked": 39.4,
"capture_points": 40,
"explosion_hits": 0,
"piercings": 3519,
"xp": 376586,
"survived_battles": 136,
"dropped_capture_points": 382,
"damage_dealt": 783555,
"hits_percents": 74,
"draws": 2,
"battles": 290,
"damage_received": 330011,
"frags": 584,
"stun_number": 0,
"direct_hits_received": 1164,
"stun_assisted_damage": 0,
"hits": 4320,
"battle_avg_xp": 1299,
"wins": 202,
"losses": 86,
"piercings_received": 1004,
"no_damage_direct_hits_received": 103,
"shots": 5857,
"explosion_hits_received": 135,
"tanking_factor": 0.04
}
}
]
}
}
for key, val in js['data']['542250529'][0]['all'].items():
print("key:", key, " val:", val)
#Or this way
for key in js['data']['542250529'][0]['all']:
print("key:", key, " val:", js['data']['542250529'][0]['all'][key])
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