r"""

A simple, fast, extensible JSON encoder and decoder

JSON (JavaScript Object Notation) <http://json.org> is a subset of

JavaScript syntax (ECMA-262 3rd edition) used as a lightweight data

interchange format.

simplejson exposes an API familiar to uses of the standard library

marshal and pickle modules.

Encoding basic Python object hierarchies::

    >>> import simplejson

    >>> simplejson.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}])

    '["foo", {"bar": ["baz", null, 1.0, 2]}]'

    >>> print simplejson.dumps("\"foo\bar")

    "\"foo\bar"

    >>> print simplejson.dumps(u'\u1234')

    "\u1234"

    >>> print simplejson.dumps('\\')

    "\\"

    >>> print simplejson.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True)

    {"a": 0, "b": 0, "c": 0}

    >>> from StringIO import StringIO

    >>> io = StringIO()

    >>> simplejson.dump(['streaming API'], io)

    >>> io.getvalue()

    '["streaming API"]'

Compact encoding::

    >>> import simplejson

    >>> simplejson.dumps([1,2,3,{'4': 5, '6': 7}], separators=(',',':'))

    '[1,2,3,{"4":5,"6":7}]'

Pretty printing::

    >>> import simplejson

    >>> print simplejson.dumps({'4': 5, '6': 7}, sort_keys=True, indent=4)

    {

        "4": 5, 

        "6": 7

    }

Decoding JSON::

    >>> import simplejson

    >>> simplejson.loads('["foo", {"bar":["baz", null, 1.0, 2]}]')

    [u'foo', {u'bar': [u'baz', None, 1.0, 2]}]

    >>> simplejson.loads('"\\"foo\\bar"')

    u'"foo\x08ar'

    >>> from StringIO import StringIO

    >>> io = StringIO('["streaming API"]')

    >>> simplejson.load(io)

    [u'streaming API']

Specializing JSON object decoding::

    >>> import simplejson

    >>> def as_complex(dct):

    ...     if '__complex__' in dct:

    ...         return complex(dct['real'], dct['imag'])

    ...     return dct

    ... 

    >>> simplejson.loads('{"__complex__": true, "real": 1, "imag": 2}',

    ...     object_hook=as_complex)

    (1+2j)

Extending JSONEncoder::

    >>> import simplejson

    >>> class ComplexEncoder(simplejson.JSONEncoder):

    ...     def default(self, obj):

    ...         if isinstance(obj, complex):

    ...             return [obj.real, obj.imag]

    ...         return simplejson.JSONEncoder.default(self, obj)

    ... 

    >>> dumps(2 + 1j, cls=ComplexEncoder)

    '[2.0, 1.0]'

    >>> ComplexEncoder().encode(2 + 1j)

    '[2.0, 1.0]'

    >>> list(ComplexEncoder().iterencode(2 + 1j))

    ['[', '2.0', ', ', '1.0', ']']

Note that the JSON produced by this module's default settings

is a subset of YAML, so it may be used as a serializer for that as well.

"""

__version__ = '1.5'

__all__ = [

    'dump', 'dumps', 'load', 'loads',

    'JSONDecoder', 'JSONEncoder',

]

from django.utils.simplejson.decoder import JSONDecoder

from django.utils.simplejson.encoder import JSONEncoder

def dump(obj, fp, skipkeys=False, ensure_ascii=True, check_circular=True,

        allow_nan=True, cls=None, indent=None, **kw):

    """

    Serialize ``obj`` as a JSON formatted stream to ``fp`` (a

    ``.write()``-supporting file-like object).

    If ``skipkeys`` is ``True`` then ``dict`` keys that are not basic types

    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``) 

    will be skipped instead of raising a ``TypeError``.

    If ``ensure_ascii`` is ``False``, then the some chunks written to ``fp``

    may be ``unicode`` instances, subject to normal Python ``str`` to

    ``unicode`` coercion rules.  Unless ``fp.write()`` explicitly

    understands ``unicode`` (as in ``codecs.getwriter()``) this is likely

    to cause an error.

    If ``check_circular`` is ``False``, then the circular reference check

    for container types will be skipped and a circular reference will

    result in an ``OverflowError`` (or worse).

    If ``allow_nan`` is ``False``, then it will be a ``ValueError`` to

    serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``)

    in strict compliance of the JSON specification, instead of using the

    JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).

    If ``indent`` is a non-negative integer, then JSON array elements and object

    members will be pretty-printed with that indent level.  An indent level

    of 0 will only insert newlines.  ``None`` is the most compact representation.

    To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the

    ``.default()`` method to serialize additional types), specify it with

    the ``cls`` kwarg.

    """

    if cls is None:

        cls = JSONEncoder

    iterable = cls(skipkeys=skipkeys, ensure_ascii=ensure_ascii,

        check_circular=check_circular, allow_nan=allow_nan, indent=indent,

        **kw).iterencode(obj)

    # could accelerate with writelines in some versions of Python, at

    # a debuggability cost

    for chunk in iterable:

        fp.write(chunk)

def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,

        allow_nan=True, cls=None, indent=None, separators=None, **kw):

    """

    Serialize ``obj`` to a JSON formatted ``str``.

    If ``skipkeys`` is ``True`` then ``dict`` keys that are not basic types

    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``) 

    will be skipped instead of raising a ``TypeError``.

    If ``ensure_ascii`` is ``False``, then the return value will be a

    ``unicode`` instance subject to normal Python ``str`` to ``unicode``

    coercion rules instead of being escaped to an ASCII ``str``.

    If ``check_circular`` is ``False``, then the circular reference check

    for container types will be skipped and a circular reference will

    result in an ``OverflowError`` (or worse).

    If ``allow_nan`` is ``False``, then it will be a ``ValueError`` to

    serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``) in

    strict compliance of the JSON specification, instead of using the

    JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).

    If ``indent`` is a non-negative integer, then JSON array elements and

    object members will be pretty-printed with that indent level.  An indent

    level of 0 will only insert newlines.  ``None`` is the most compact

    representation.

    If ``separators`` is an ``(item_separator, dict_separator)`` tuple

    then it will be used instead of the default ``(', ', ': ')`` separators.

    ``(',', ':')`` is the most compact JSON representation.

    To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the

    ``.default()`` method to serialize additional types), specify it with

    the ``cls`` kwarg.

    """

    if cls is None:

        cls = JSONEncoder

    return cls(

        skipkeys=skipkeys, ensure_ascii=ensure_ascii,

        check_circular=check_circular, allow_nan=allow_nan, indent=indent,

        separators=separators,

        **kw).encode(obj)

def load(fp, encoding=None, cls=None, object_hook=None, **kw):

    """

    Deserialize ``fp`` (a ``.read()``-supporting file-like object containing

    a JSON document) to a Python object.

    If the contents of ``fp`` is encoded with an ASCII based encoding other

    than utf-8 (e.g. latin-1), then an appropriate ``encoding`` name must

    be specified.  Encodings that are not ASCII based (such as UCS-2) are

    not allowed, and should be wrapped with

    ``codecs.getreader(fp)(encoding)``, or simply decoded to a ``unicode``

    object and passed to ``loads()``

    ``object_hook`` is an optional function that will be called with the

    result of any object literal decode (a ``dict``).  The return value of

    ``object_hook`` will be used instead of the ``dict``.  This feature

    can be used to implement custom decoders (e.g. JSON-RPC class hinting).

    To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``

    kwarg.

    """

    if cls is None:

        cls = JSONDecoder

    if object_hook is not None:

        kw['object_hook'] = object_hook

    return cls(encoding=encoding, **kw).decode(fp.read())

def loads(s, encoding=None, cls=None, object_hook=None, **kw):

    """

    Deserialize ``s`` (a ``str`` or ``unicode`` instance containing a JSON

    document) to a Python object.

    If ``s`` is a ``str`` instance and is encoded with an ASCII based encoding

    other than utf-8 (e.g. latin-1) then an appropriate ``encoding`` name

    must be specified.  Encodings that are not ASCII based (such as UCS-2)

    are not allowed and should be decoded to ``unicode`` first.

    ``object_hook`` is an optional function that will be called with the

    result of any object literal decode (a ``dict``).  The return value of

    ``object_hook`` will be used instead of the ``dict``.  This feature

    can be used to implement custom decoders (e.g. JSON-RPC class hinting).

    To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``

    kwarg.

    """

    if cls is None:

        cls = JSONDecoder

    if object_hook is not None:

        kw['object_hook'] = object_hook

    return cls(encoding=encoding, **kw).decode(s)

def read(s):

    """

    json-py API compatibility hook.  Use loads(s) instead.

    """

    import warnings

    warnings.warn("simplejson.loads(s) should be used instead of read(s)",

        DeprecationWarning)

    return loads(s)

def write(obj):

    """

    json-py API compatibility hook.  Use dumps(s) instead.

    """

    import warnings

    warnings.warn("simplejson.dumps(s) should be used instead of write(s)",

        DeprecationWarning)

    return dumps(obj)