解析json数组到Python列表

问题描述：

我已经创建了我自己的json数据与我想解析成python列表的数组。不过，我一直有这个麻烦。解析json数组到Python列表

如何将json数组提取到python列表中？

JSON数据：

[ 
    { 
    "ip": "192.168.241.109", 
    "cameras": 
     { 
      "front": "nf091", 
      "inside": "nf067", 
      "right": "004317", 
      "rear": "000189", 
      "left": "nf084" 
     } 
    }, 
    { 
    "ip": "192.168.241.110",   
    "cameras": 
    { 
      "front": "nf091", 
      "inside": "nf067", 
      "right": "004317", 
      "rear": "000189", 
      "left": "nf084" 
    } 
    } 
]

我的JSON数据是有效的，所以我不知道为什么我在与下面的代码的麻烦：

system_json = open(json_file) 
json_obj = json.load(system_json) 

camera_details = [[i['front'], i['rear'], i['left'], i['right'], i['inside']] for i in json_obj['cameras']]

上面的代码片断不因为它会产生list indices must be integers, not str错误。

我在做什么错，我该如何正确解析我的json数组到python列表中？

答

问题是你的JSON“对象”是一个列表，但是你尝试用一个字符串（json_obj['cameras']）索引它。

你有什么是一个JSON数组，其中的每个元素是一个包含（除别的之外）一个名为"cameras"的键的字典。我相信这个代码你想要做什么：

import json 

text = """[{"ip": "192.168.241.109", "cameras": {"front": "nf091", "inside": "nf067", "right": "004317", "rear": "000189", "left": "nf084"}}, {"ip": "192.168.241.110", "cameras": {"front": "nf091", "inside": "nf067", "right": "004317", "rear": "000189", "left": "nf084"}}]""" 

json_array = json.loads(text) 

camera_details = [[i['cameras']['front'], i['cameras']['rear'], i['cameras']['left'], i['cameras']['right'], i['cameras']['inside']] for i in json_array] 
print(camera_details) 

# Output: 
# [['nf091', '000189', 'nf084', '004317', 'nf067'], ['nf091', '000189', 'nf084', '004317', 'nf067']]

编辑

可能更清晰/更容易？

camera_details = [ 
    [ 
     cameras["front"], 
     cameras["rear"], 
     cameras["left"], 
     cameras["right"], 
     cameras["inside"], 
    ] 
    for cameras in [item["cameras"] for item in json_array] 
]

解析json数组到Python列表

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