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3.2 explain json.dumps for non-string keys in dicts. closes issue6566. Patch contributed Kirubakaran Athmanathan

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Senthil Kumaran 2012-03-17 00:40:34 -07:00
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Doc/library/json.rst
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@ -168,6 +168,14 @@ Basic Usage
so trying to serialize multiple objects with repeated calls to so trying to serialize multiple objects with repeated calls to
:func:`dump` using the same *fp* will result in an invalid JSON file. :func:`dump` using the same *fp* will result in an invalid JSON file.
.. note::
Keys in key/value pairs of JSON are always of the type :class:`str`. When
a dictionary is converted into JSON, all the keys of the dictionary are
coerced to strings. As a result of this, if a dictionary is convered
into JSON and then back into a dictionary, the dictionary may not equal
the original one. That is, ``loads(dumps(x)) != x`` if x has non-string
keys.
.. function:: load(fp, cls=None, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, object_pairs_hook=None, **kw) .. function:: load(fp, cls=None, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, object_pairs_hook=None, **kw)