Python parsing JSON with escaped double quotes
Consider this valid json:
{"a": 1, "b": "{"c":2}"}
Python's json module throws when I try to parse it - it looks like the " is throwing it off:
json.loads('{"a": 1, "b": "{"c":2}"}')
Traceback (most recent call last):
File "", line 1, in
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py", line 338, in loads
return _default_decoder.decode(s)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 365, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 381, in raw_decode
obj, end = self.scan_once(s, idx)
ValueError: Expecting , delimiter: line 1 column 15 (char 14)
Is there any way to parse this in Python, either using the json module or some other module like ujson ?
Actually it doesn't matter with escaped double quotes. See my test:
>>> json.loads('{"a": 1, "b": "{"c":2}"}')
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "/usr/lib/python3.4/json/__init__.py", line 318, in loads
return _default_decoder.decode(s)
File "/usr/lib/python3.4/json/decoder.py", line 343, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python3.4/json/decoder.py", line 359, in raw_decode
obj, end = self.scan_once(s, idx)
ValueError: Expecting ',' delimiter: line 1 column 18 (char 17)
>>> json.loads('{"a": 1, "b": "{"c":2}"}')
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "/usr/lib/python3.4/json/__init__.py", line 318, in loads
return _default_decoder.decode(s)
File "/usr/lib/python3.4/json/decoder.py", line 343, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python3.4/json/decoder.py", line 359, in raw_decode
obj, end = self.scan_once(s, idx)
ValueError: Expecting ',' delimiter: line 1 column 18 (char 17)
>>> json.loads('{"a": 1, "b": {"c":2}}')
{'a': 1, 'b': {'c': 2}}
>>> json.loads('{"a": 1, "b": {"c":2}}')
{'a': 1, 'b': {'c': 2}}
>>>
Inside a quoted string, " is treated the same as a regular quote:
>>> '{"a": 1, "b": "{"c":2}"}'
'{"a": 1, "b": "{"c":2}"}'
As a result, your string is not valid JSON.
You need to escape the backslashes as well, so that they are sent to loads . You can see this by encoding your desired dictionary with dumps :
>>> json.dumps({"a": 1, "b": "{"c": 2}"})
'{"a": 1, "b": "{"c": 2}"}'
>>> json.loads('{"a": 1, "b": "{"c": 2}"}')
{u'a': 1, u'b': u'{"c": 2}'}
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