JSON ValueError:期望的属性名称:第1行第2列(字符1) [英] JSON ValueError: Expecting property name: line 1 column 2 (char 1)

问题描述

我在使用json.loads转换为dict对象时遇到了麻烦，我无法弄清楚自己在做什么错.运行此错误的确切原因是

I am having trouble using json.loads to convert to a dict object and I can't figure out what I'm doing wrong.The exact error I get running this is

ValueError: Expecting property name: line 1 column 2 (char 1)

这是我的代码:

from kafka.client import KafkaClient
from kafka.consumer import SimpleConsumer
from kafka.producer import SimpleProducer, KeyedProducer
import pymongo
from pymongo import MongoClient
import json

c = MongoClient("54.210.157.57")
db = c.test_database3
collection = db.tweet_col

kafka = KafkaClient("54.210.157.57:9092")

consumer = SimpleConsumer(kafka,"myconsumer","test")
for tweet in consumer:
    print tweet.message.value
    jsonTweet=json.loads(({u'favorited': False, u'contributors': None})
    collection.insert(jsonTweet)

我很确定该错误发生在倒数第二行

I'm pretty sure that the error is occuring at the 2nd to last line

jsonTweet=json.loads({u'favorited': False, u'contributors': None})

但是我不知道该怎么办.任何建议将不胜感激.

but I do not know what to do to fix it. Any advice would be appreciated.

推荐答案

json.loads将json字符串加载到python dict中，json.dumps会将python dict转储到json字符串中，例如:

json.loads will load a json string into a python dict, json.dumps will dump a python dict to a json string, for example:

>>> json_string = '{"favorited": false, "contributors": null}'
'{"favorited": false, "contributors": null}'
>>> value = json.loads(json_string)
{u'favorited': False, u'contributors': None}
>>> json_dump = json.dumps(value)
'{"favorited": false, "contributors": null}'

因此该行是不正确的，因为您尝试使用load python dict，并且json.loads期望有效的json string应该具有<type 'str'>.

So that line is incorrect since you are trying to load a python dict, and json.loads is expecting a valid json string which should have <type 'str'>.

因此，如果您尝试加载json，则应更改要加载的内容，使其看起来像上面的json_string，否则您应该将其转储.根据给定的信息，这只是我的最佳猜测.您要完成什么?

So if you are trying to load the json, you should change what you are loading to look like the json_string above, or you should be dumping it. This is just my best guess from the given information. What is it that you are trying to accomplish?

您也不需要在字符串前指定u，如注释中提到的@Cld.

Also you don't need to specify the u before your strings, as @Cld mentioned in the comments.

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