simplejson

simplejson exposes an API familiar to users of the standard library marshal and pickle modules. It is the externally maintained version of the json library contained in Python 2.6, but maintains compatibility with Python 2.5 and (currently) has significant performance advantages, even without using the optional C extension for speedups. simplejson is also supported on Python 3.3+.

Encoding

In [1]: import simplejson as json

In [2]: json.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}])
Out[2]: '["foo", {"bar": ["baz", null, 1.0, 2]}]'

In [3]: print(json.dumps({'c': 0, 'b': 0, 'a': 0}, sort_keys=True))
{"a": 0, "b": 0, "c": 0}

Pretty printing

In [4]: print(json.dumps({'4': 5, '6': 7}, sort_keys=True, indent=4 * ' '))
{
    "4": 5,
    "6": 7
}

Decoding

In [8]: obj = [u'foo', {u'bar': [u'baz', None, 1.0, 2]}]

In [9]: json.loads('["foo", {"bar":["baz", null, 1.0, 2]}]') == obj
Out[9]: True