如何用Python解码JSON？_Python_Json_Python 3.x_Decode

如何用Python解码JSON？

python json python-3.x

如何用Python解码JSON？,python,json,python-3.x,decode,Python,Json,Python 3.x,Decode,我正在尝试用Python解码JSON。下面是JSON的一个小片段 b'{"success":true,"data":[{"id":26,"name":"A","comment":"","start_time_plan":null,"start_time_actual":"2016-09-13 00:00:00","start_time_delta":null,"start_time_score":null,"start_time_score_achievement":null,"start_ti

我正在尝试用Python解码JSON。下面是JSON的一个小片段

b'{"success":true,"data":[{"id":26,"name":"A","comment":"","start_time_plan":null,"start_time_actual":"2016-09-13 00:00:00","start_time_delta":null,"start_time_score":null,"start_time_score_achievement":null,"start_time_traffic_light":null,"end_time_plan":null,"end_time_actual":"2016-09-13 00:00:00","end_time_delta":null,"end_time_score":null,"end_time_score_achievement":null,"end_time_traffic_light":null,"status":0,"measure_schedule_revision_id":63,"responsible_user_id":3,"created_time":"2016-09-13 11:29:14","created_user_id":3,"modified_time":"2016-09-21 16:33:41","modified_user_id":3,"model":"Activity"},{"id":27,"name":"B","comment":"","start_time_plan":null,"start_time_actual":"2016-09-13 00:00:00","start_time_delta":null,"start_time_score":null,"start_time_score_achievement":null,"start_time_traffic_light":null,"end_time_plan":null,"end_time_actual":"2016-09-13 00:00:00","end_time_delta":null,"end_time_score":null,"end_time_score_achievement":null,"end_time_traffic_light":null,"status":0,"measure_schedule_revision_id":63,"responsible_user_id":3,"created_time":"2016-09-13 11:29:48","created_user_id":3,"modified_time":"2016-10-16 18:14:36","modified_user_id":1,"model":"Activity"}

我正试图获得

start\u time\u delta

和

end\u time\u delta

并生成一个小散点图。但不知怎的，我无法解码JSON

以下是我的工作：

#falcon api
u = 'https://myurl.com'

#urllib3 + poolmanager for requests
import urllib3
http = urllib3.PoolManager()

import json
r = http.request('GET', u)
json.loads(r.data.decode('utf-8'))

end = json.loads(r.data['end_time_delta'])
start = json.loads(r.data['start_time_delta'])

这就是我得到的错误：字节索引必须是整数或片，而不是str

为什么？我该如何解决这个问题呢？

您在这里忽略了

json.loads（）

的返回值：

json.loads(r.data.decode('utf-8'))

然后再次尝试解码相同的原始数据，并尝试将其用作解码后的Python结果。调用

json.loads（）

一次，并使用生成的Python字典：

result = json.loads(r.data.decode('utf-8'))
start = result['data'][0]['start_time_delta']
end = result['data'][0]['end_time_delta']

因为顶级字典

'data'

指向一个结果列表，所以我使用

获取第一个结果并提取所需的数据

如果需要为该列表中的每个字典提取这些数据点，则必须使用循环：

for entry in result['data']:
    start = entry['start_time_delta']
    end = entry['end_time_delta']
    # do something with these two values, before iterating to the next

此处忽略了

json.loads（）的返回值。

：

json.loads(r.data.decode('utf-8'))