使用python将JSON转换为CSV

Question

我有JSON数据：

u'{"result":[{"timestamp":1356843600000,"values":{"stream:sentimentNeutral":0}},{"timestamp":1356930000000,"values":{"stream:sentimentNeutral":15672}},{"timestamp":1357016400000,"values":{"stream:sentimentNeutral":13646}},{"timestamp":1357102800000,"values":{"stream:sentimentNeutral":14301}

现在，需要将其写入新的csv文件。 我得到了“响应”为JSON

response = requests.get(end_point,params=query_params);

# pprint.pprint(response.text)


data = json.loads(response.text)


f=csv.writer(open('test_1.csv','wb+'))

for item in data['result']:
 f.writerow(item['timestamp']['stream:sentimentNeutral'].values())

我得到这个错误

Traceback (most recent call last):
  File "G:\Python\codevOne.py", line 26, in <module>
    f.writerow(item['timestamp']['stream:sentimentNeutral'].values())
TypeError: 'long' object has no attribute '__getitem__'
>>> 

请更正我的错误。我觉得我正在努力遍历字典中的某个字典。 我期望的结果是一个名为“ test.csv”的文件，其中包含一个时间戳记行和相应的stream：sentimentNeutral值

Answer 1

编辑：添加完整测试的源代码这可以完成这项工作（如果我正确理解了您想要的内容）：

for item in data['result']:
  f.writerow((item['timestamp'], item['values']['stream:sentimentNeutral']))

它提供了一个由以下几行组成的csv文件timestamp, stream:sentimentNeutral

这是对您的数据的完整测试：

import pprint
import csv
import json

resp = u'{"result":[{"timestamp":1356843600000,"values":{"stream:sentimentNeutral":0}},{"timestamp":1356930000000,"values":{"stream:sentimentNeutral":15672}},{"timestamp":1357016400000,"values":{"stream:sentimentNeutral":13646}},{"timestamp":1357102800000,"values":{"stream:sentimentNeutral":14301}}]}'
data = json.loads(resp)
pprint.pprint(data)
with open('test_1.csv','wb+') as fd:
    f = csv.writer(fd)
    for item in data['result']:
        f.writerow((item['timestamp'], item['values']['stream:sentimentNeutral']))

pprint的输出是：

{u'result': [{u'timestamp': 1356843600000L,
              u'values': {u'stream:sentimentNeutral': 0}},
             {u'timestamp': 1356930000000L,
              u'values': {u'stream:sentimentNeutral': 15672}},
             {u'timestamp': 1357016400000L,
              u'values': {u'stream:sentimentNeutral': 13646}},
             {u'timestamp': 1357102800000L,
              u'values': {u'stream:sentimentNeutral': 14301}}]}

这是test_1.csv的内容

1356843600000,0
1356930000000,15672
1357016400000,13646
1357102800000,14301

Answer 2

因为在您的代码item['timestamp']是一个数字值，例如，在第一个循环中，所以它的值为1356843600000，而不是dict。

您应该使用：

for item in data['result']:
    timestamp = item['timestamp']
    value = item['values']['stream:sentimentNeutral']
    f.writerow([timestamp, value])