Question

这是我在GCM-python中的响应代码，

{"multicast_id":6343554431392278573,"success":5,"failure":15,"canonical_ids":0,"results":[{"message_id":"0:1380910865603840%356b
9054f9fd7ecd"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":
"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"message_id":"0:1380910865592683%356b9054f9fd7ecd"},{"erro
r":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"er
ror":"NotRegistered"},{"message_id":"0:1380910865600910%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"message_id":"0:1380910865
596592%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"message_id":"0:1380910865595499%356b9054f9fd7ecd"}]}

当我收到此回复时，我想从字典中收集所有错误密钥...但它似乎是一个字符串，我将尝试使用 json.dumps（）在json中转储然后删除斜线但不适合我，甚至 ast 工作。我试试这个python json dumps。我在那里错过了什么？请帮帮我。

Answer 1

如果是字符串，请加载它，不要转储它：

#! /usr/bin/python3

import json

a = '''{"multicast_id":6343554431392278573,"success":5,"failure":15,"canonical_ids":0,"results":[{"message_id":"0:1380910865603840%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":
"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"message_id":"0:1380910865592683%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"message_id":"0:1380910865600910%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"message_id":"0:1380910865596592%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"message_id":"0:1380910865595499%356b9054f9fd7ecd"}]}'''

j = json.loads(a)
errors = [d for d in j ['results'] if 'error' in d]
print(errors)

Answer 2

由于您收到的数据是有效的Python数据，您只需使用[ast.literal_eval] [1]

<强>演示

import ast
data = '''{"multicast_id":6343554431392278573,"success":5,"failure":15,"canonical_ids":0,"results":[{"message_id":"0:1380910865603840%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":
"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"message_id":"0:1380910865592683%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"error":"NotRegistered"},{"message_id":"0:1380910865600910%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"message_id":"0:1380910865596592%356b9054f9fd7ecd"},{"error":"NotRegistered"},{"message_id":"0:1380910865595499%356b9054f9fd7ecd"}]}'''

>>> pp.pprint(ast.literal_eval(data))
{   'canonical_ids': 0,
    'failure': 15,
    'multicast_id': 6343554431392278573L,
    'results': [   {   'message_id': '0:1380910865603840%356b9054f9fd7ecd'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'message_id': '0:1380910865592683%356b9054f9fd7ecd'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'error': 'NotRegistered'},
                   {   'message_id': '0:1380910865600910%356b9054f9fd7ecd'},
                   {   'error': 'NotRegistered'},
                   {   'message_id': '0:1380910865596592%356b9054f9fd7ecd'},
                   {   'error': 'NotRegistered'},
                   {   'message_id': '0:1380910865595499%356b9054f9fd7ecd'}],
    'success': 5}
>>>

然后转储错误

>>> pp.pprint([elem['error'] for elem in ast.literal_eval(data)['results'] if 'error' in elem])
[   'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered',
    'NotRegistered']

如何将python字符串数据转换为列表或dict？

2 个答案: