loads

Deserialize ``s`` (a ``str``, ``bytes`` or ``bytearray`` instance
containing a JSON document) to a Python object.

``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).

``object_pairs_hook`` is an optional function that will be called with
the result of any object literal decoded with an ordered list of pairs.
The return value of ``object_pairs_hook`` will be used instead of the
``dict``.  This feature can be used to implement custom decoders.  If
``object_hook`` is also defined, the ``object_pairs_hook`` takes
priority.

``array_hook`` is an optional function that will be called with the
result of any literal array decode (a ``list``).  The return value of
this function will be used instead of the ``list``.  This feature can
be used along ``object_pairs_hook`` to customize the resulting data
structure - for example, by setting that to ``frozendict`` and
``array_hook`` to ``tuple``, one can get a deep immutable data structure
from any JSON data.

``parse_float``, if specified, will be called with the string
of every JSON float to be decoded. By default this is equivalent to
float(num_str). This can be used to use another datatype or parser
for JSON floats (e.g. decimal.Decimal).

``parse_int``, if specified, will be called with the string
of every JSON int to be decoded. By default this is equivalent to
int(num_str). This can be used to use another datatype or parser
for JSON integers (e.g. float).

``parse_constant``, if specified, will be called with one of the
following strings: -Infinity, Infinity, NaN.
This can be used to raise an exception if invalid JSON numbers
are encountered.

To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``
kwarg; otherwise ``JSONDecoder`` is used.