I found a syntax type in your demo example on https://docs.python.org/2/library/json.html

>>> print json.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True)
{"a": 0, "b": 0, "c": 0}

The correct return should be a 'str' type not json. Therefore:

>>> print json.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True)
'{"a": 0, "b": 0, "c": 0}'

If you run the command in your interpreter you'll see that the output is correct.

It returns a string, and the print statement/function prints the contents of that string. Perhaps you are confused between JSON strings, which appear in the output, and Python strings, which hold the characters to output.