Python中使用json.loads解码字符串时出错:ValueError: Expecting property name: line 1 column 1 (char 1)

原文地址:http://www.crifan.com/python_json_loads_valueerror_expecting_property_name_line_1_column_1_char_1/

【问题】

处理:

http://www.yupoo.com/photos/shanshu/87329678/

中的html代码过程中,用代码:

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photoInfoDict = json.loads(photoInfoJson);

 

去解码json字符串:

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{id: '379879-87329678' ,owner: '379879' ,ownername: 'shanshu' ,title: 'IMG_3464' ,description: '' ,bucket: 'shanshu' ,key: 'CsFzMuHz' ,license: 0 ,stats_notes: 0 ,albums: [ '379879-181880' ,],tags:[{name: '20121202' , author: '379879' },{name: '天平山赏红枫' , author: '379879' }],owner:{id: 379879 ,username: 'shanshu' ,nickname: 'shanshu' }}

注:

格式化后,为:

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{
     id : '379879-87329678' ,
     owner : '379879' ,
     ownername : 'shanshu' ,
     title : 'IMG_3464' ,
     description : '' ,
     bucket : 'shanshu' ,
     key : 'CsFzMuHz' ,
     license : 0 ,
     stats_notes : 0 ,
     albums : [ '379879-181880' , ],
     tags : [{
             name : '20121202' ,
             author : '379879'
         }, {
             name : '天平山赏红枫' ,
             author : '379879'
         }
     ],
     owner : {
         id : 379879 ,
         username : 'shanshu' ,
         nickname : 'shanshu'
     }
}

 

结果出错:

    photoInfoDict = json.loads(photoInfoJson);

  File "D:\tmp\dev_install_root\Python27_x64\lib\json\__init__.py", line 326, in loads

    return _default_decoder.decode(s)

  File "D:\tmp\dev_install_root\Python27_x64\lib\json\decoder.py", line 366, in decode

    obj, end = self.raw_decode(s, idx=_w(s, 0).end())

  File "D:\tmp\dev_install_root\Python27_x64\lib\json\decoder.py", line 382, in raw_decode

    obj, end = self.scan_once(s, idx)

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

 

【解决过程】

1.参考:

Error msg from using wrong quotes in JSON is unhelpful

中,解释说是,JSON字符串中,不能包含单引号,而必须是双引号。

2.所以去改为双引号:

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photoInfoJsonDoubleQuote = photoInfoJson.replace( "'" , '"');
logging.info( "photoInfoJsonDoubleQuote=%s" , photoInfoJsonDoubleQuote);
photoInfoDict = json.loads(photoInfoJsonDoubleQuote);
logging.info( "photoInfoDict=%s" , photoInfoDict);

结果错误依旧。

3.看起来,应该是,属性,没有添加双引号所导致的,应该是类似于:

"id":"379879-87329678"

估计才可以的。

4.给定utf8参数:

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photoInfoJsonDoubleQuote = photoInfoJson.replace( "'" , '"');
logging.info( "photoInfoJsonDoubleQuote=%s" , photoInfoJsonDoubleQuote);
#photoInfoDict = json.loads(photoInfoJsonDoubleQuote);
photoInfoDict = json.loads(photoInfoJsonDoubleQuote, "UTF-8" );
logging.info( "photoInfoDict=%s" , photoInfoDict);

也还是不行:

5.网上找了半天,结果找到自己的帖子:

【已解决】Python中用json.loads去解析字符串出错:ValueError: Expecting property name: line 1 column 51 (char 51)

然后手动处理后,结果用如下代码:

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photoInfoJsonAddQuote = re.sub(r "(,?)(\w+?)\s*?:" , r "\1'\2':" , photoInfoJson);
logging.info( "photoInfoJsonAddQuote=%s" , photoInfoJsonAddQuote);
photoInfoJsonDoubleQuote = photoInfoJsonAddQuote.replace( "'", "\"");
logging.info("photoInfoJsonDoubleQuote=%s", photoInfoJsonDoubleQuote);
 
#photoInfoJsonDoubleQuote = photoInfoJson.replace("'" , '"');
#logging.info("photoInfoJsonDoubleQuote=%s", photoInfoJsonDoubleQuote);
#photoInfoDict = json.loads(photoInfoJsonDoubleQuote);
#photoInfoDict = json.loads(photoInfoJsonDoubleQuote, "UTF-8");
photoInfoDict = json.loads(photoInfoJsonDoubleQuote);
logging.info( "photoInfoDict=%s" , photoInfoDict);

上述问题是解决了,但却又出现其他错误:

ValueError: No JSON object could be decoded

6.详细过程参见:

【已解决】Python中用json.loads解码字符串出错:ValueError: No JSON object could be decoded

 

【总结】

此处的

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

类型的错误,就是由于JSON中,标准语法中,不支持单引号,

属性或者属性值,都必须是双引号括起来的。

所以,可以用类似于:

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addedSingleQuoteJsonStr = re.sub(r"(,?)(\w+?)\s*?:", r"\1'\2':", orginalJsonStr);
doubleQuotedJsonStr = addedSingleQuoteJsonStr.replace("'", "\"");

的代码,去:

  • 给属性添加单引号;
  • 把所有的单引号替换成双引号;

就可以了。

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