Optimus Optimus - 1 year ago 163
JSON Question

json.loads(jsonstring) in Python fails if string has a "\r" i.e. carriage return character

I am getting a JSON string which has a

character somewhere e.g.
"{"data":"foo \r\n bar"}"
when I try to parse it throws

>>> j="""{"data":"foo \r\n bar"}"""
>>> import json
>>> f=json.loads(j)

Traceback (most recent call last):
File "<pyshell#2>", line 1, in <module>
File "C:\Python27\lib\json\__init__.py", line 326, in loads
return _default_decoder.decode(s)
File "C:\Python27\lib\json\decoder.py", line 366, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\Python27\lib\json\decoder.py", line 382, in raw_decode
obj, end = self.scan_once(s, idx)
ValueError: Invalid control character at: line 1 column 13 (char 13)
>>> j[13]

is a perfectly legal character in a Python string.

How can I parse this JSON string, such that

>>> dct = somehow_parse_json(j)
>>> dct['data']
'foo \r\n bar'

I could easily just find and pop carriage return characters, but I would prefer if they can be saved.

Answer Source

You should escape slashes in JSON:

j="""{"data":"foo \\r\\n bar"}"""

If you are not escaping them, your JSON is invalid (being valid Python string).

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