Python:将JSON对象附加到嵌套列表 [英] Python: Append JSON objects to nested list

问题描述

我试图遍历IP地址列表，并从URL中提取JSON数据，然后尝试将该JSON数据放入嵌套列表中.

I'm trying to iterate through a list of IP addresses, and extracting the JSON data from my url, and trying to put that JSON data into a nested list.

似乎我的代码一遍又一遍地覆盖了我的列表，并且只会显示一个JSON对象，而不是我指定的许多对象.

It seems as if my code is overwriting my list over and over, and will only show one JSON object, instead of the many I have specified.

这是我的代码:

for x in range(0, 10):
    try:
        url = 'http://' + ip_addr[x][0] + ':8080/system/ids/'
        response = urlopen(url)
        json_obj = json.load(response)
    except:
        continue

    camera_details = [[i['name'], i['serial']] for i in json_obj['cameras']]

for x in camera_details:
    #This only prints one object, and not 10.
    print x

如何将JSON对象附加到列表中，然后将"name"和"serial"值提取到嵌套列表中?

How can I append my JSON objects into a list, and then extract the 'name' and 'serial' values into a nested list?

推荐答案

尝试一下

camera_details = []
for x in range(0, 10):
    try:
        url = 'http://' + ip_addr[x][0] + ':8080/system/ids/'
        response = urlopen(url)
        json_obj = json.load(response)
    except:
        continue

    camera_details.extend([[i['name'], i['serial']] for i in json_obj['cameras']])

for x in camera_details:
    print x

在您的代码中，您只获取最后一个请求数据

in your code you where only getting the last requests data

最好是使用append并避免列表理解

Best would be using append and avoiding list comprehension

camera_details = []
for x in range(0, 10):
    try:
        url = 'http://' + ip_addr[x][0] + ':8080/system/ids/'
        response = urlopen(url)
        json_obj = json.load(response)
    except:
        continue
    for i in json_obj['cameras']:
        camera_details.append([i['name'], i['serial']])

for x in camera_details:
    print x

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