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| -rw-r--r-- | Doc/library/json.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Doc/library/json.rst b/Doc/library/json.rst index a791259..f656700 100644 --- a/Doc/library/json.rst +++ b/Doc/library/json.rst @@ -168,6 +168,14 @@ Basic Usage so trying to serialize multiple objects with repeated calls to :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) |