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What is the difference between json.dumps/loads and tornado.escape.json_encode/json_decode?

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python

tornado

It seems they are behaving exactly the same way.

>>> data
[('a', 'b'), {'a': 1, 'b': 2}, ['a', 'b'], 'a', 'b']
>>> json.dumps(data)
'[["a", "b"], {"a": 1, "b": 2}, ["a", "b"], "a", "b"]'
>>> tornado.escape.json_encode(data)
'[["a", "b"], {"a": 1, "b": 2}, ["a", "b"], "a", "b"]'
>>> json.loads(json.dumps(data))
[[u'a', u'b'], {u'a': 1, u'b': 2}, [u'a', u'b'], u'a', u'b']
>>> tornado.escape.json_decode(json.dumps(data))
[[u'a', u'b'], {u'a': 1, u'b': 2}, [u'a', u'b'], u'a', u'b']
like image 419
CDT Avatar asked Apr 26 '13 03:04

CDT


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1 Answers

Sometimes it's useful to read the source code:

def json_encode(value):
    return json.dumps(value).replace("</", "<\\/")

def json_decode(value):
    return json.loads(to_basestring(value))

def to_basestring(value):
    if isinstance(value, _BASESTRING_TYPES):
        return value
    assert isinstance(value, bytes_type)
    return value.decode("utf-8")

to_basestring is mostly needed for python 3.x to ensure the value has type str, not bytes, because json.loads can't deal with the latter.

like image 113
gatto Avatar answered Nov 10 '22 06:11

gatto