:term:`file-like object`) using this:ref:`Python-to-JSON conversion table

<py-to-json-table>`.

To use a custom:class:`JSONEncoder` subclass (for example, one that overrides the

:meth:`~JSONEncoder.default` method to serialize additional types), specify it with the

*cls* keyword argument; otherwise:class:`JSONEncoder` is used.

..note::

Unlike:mod:`pickle` and:mod:`marshal`, JSON is not a framed protocol,

If ``True`` (the default), their JavaScript equivalents

(``NaN``, ``Infinity``, ``-Infinity``) are used.

If set, a custom JSON encoder with the

:meth:`~JSONEncoder.default` method overridden,

for serializing into custom datatypes.

If ``None`` (the default),:class:`!JSONEncoder` is used.

:type cls: a:class:`JSONEncoder` subclass

If a positive integer or string, JSON array elements and

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

If ``None`` (the default),:exc:`!TypeError` is raised.

:type default::term:`callable` | None

If ``True``, dictionaries will be outputted sorted by key.

Default ``False``.