human
Complete this python program:
def _parse_json(s):
assistant
#Here is the Python program you requested.

    """parse str into JsonDict
    """
    def _obj_hook(pairs):
        '    convert    json    object    to    python    object    '
        o = JsonDict()
        for (k, v) in pairs.iteritems():
            o[str(k)] = v
        return o
    return json.loads(s, object_hook=_obj_hook)