python基础：json.loads(str)出现错误总结

 1 >>> import json
 2 >>> test="{‘data‘:‘123‘}"
 3 >>> result=json.loads(test)
 4 Traceback (most recent call last):
 5   File "<stdin>", line 1, in <module>
 6   File "d:\Anaconda3\lib\json\__init__.py", line 319, in loads
 7     return _default_decoder.decode(s)
 8   File "d:\Anaconda3\lib\json\decoder.py", line 339, in decode
 9     obj, end = self.raw_decode(s, idx=_w(s, 0).end())
10   File "d:\Anaconda3\lib\json\decoder.py", line 355, in raw_decode
11     obj, end = self.scan_once(s, idx)
12 json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes:
13  line 1 column 2 (char 1)

原因在于：字符串里用单引号来标识字符。

解决办法如下：将字符串里的单引号替换成双引号

1 >>> import re
2 >>> test=re.sub(‘\‘‘,‘\"‘,test)
3 >>> result=json.loads(test)
4 >>> result[‘data‘]
5 ‘123‘  

对于带u‘的字符串，u也要去掉：

 1 >>> c=f.read()
 2 >>> c
 3 "{u‘meta‘: {u‘code‘: 200, u‘requestId‘: u‘5815f6739fb6b77494061e19‘}, u‘response
 4 ‘: {u‘tips‘: {u‘count‘: 0, u‘items‘: []}}}"
 5 >>> d=re.sub("u‘","\"",c)
 6 >>> d
 7 ‘{"meta\‘: {"code\‘: 200, "requestId\‘: "5815f6739fb6b77494061e19\‘}, "response\
 8 ‘: {"tips\‘: {"count\‘: 0, "items\‘: []}}}‘
 9 >>> d=re.sub("‘","\"",d)
10 >>> d
11 ‘{"meta": {"code": 200, "requestId": "5815f6739fb6b77494061e19"}, "response": {"
12 tips": {"count": 0, "items": []}}}‘
13 >>> json.loads(d)
14 {‘response‘: {‘tips‘: {‘items‘: [], ‘count‘: 0}}, ‘meta‘: {‘requestId‘: ‘5815f67
15 39fb6b77494061e19‘, ‘code‘: 200}}