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https://github.com/python-rapidjson/python-rapidjson

Python wrapper around rapidjson
https://github.com/python-rapidjson/python-rapidjson

json-parser json-serialization python3

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Python wrapper around rapidjson

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.. -*- coding: utf-8 -*-
.. :Project: python-rapidjson -- Introduction
.. :Author: Ken Robbins
.. :License: MIT License
.. :Copyright: © 2015 Ken Robbins
.. :Copyright: © 2016, 2017, 2018, 2020, 2022, 2024 Lele Gaifax
..

==================
python-rapidjson
==================

Python wrapper around RapidJSON
===============================

:Authors: Ken Robbins ; Lele Gaifax
:License: `MIT License`__
:Status: |build| |doc|

__ https://raw.githubusercontent.com/python-rapidjson/python-rapidjson/master/LICENSE
.. |build| image:: https://travis-ci.org/python-rapidjson/python-rapidjson.svg?branch=master
:target: https://travis-ci.org/python-rapidjson/python-rapidjson
:alt: Build status
.. |doc| image:: https://readthedocs.org/projects/python-rapidjson/badge/?version=latest
:target: https://readthedocs.org/projects/python-rapidjson/builds/
:alt: Documentation status

RapidJSON_ is an extremely fast C++ JSON parser and serialization library: this module
wraps it into a Python 3 extension, exposing its serialization/deserialization (to/from
either ``bytes``, ``str`` or *file-like* instances) and `JSON Schema`__ validation
capabilities.

Latest version documentation is automatically rendered by `Read the Docs`__.

__ http://json-schema.org/documentation.html
__ https://python-rapidjson.readthedocs.io/en/latest/

Getting Started
---------------

First install ``python-rapidjson``:

.. code-block:: bash

$ pip install python-rapidjson

or, if you prefer `Conda`__:

.. code-block:: bash

$ conda install -c conda-forge python-rapidjson

__ https://conda.io/docs/

Basic usage looks like this:

.. code-block:: python

>>> import rapidjson
>>> data = {'foo': 100, 'bar': 'baz'}
>>> rapidjson.dumps(data)
'{"foo":100,"bar":"baz"}'
>>> rapidjson.loads('{"bar":"baz","foo":100}')
{'bar': 'baz', 'foo': 100}
>>>
>>> class Stream:
... def write(self, data):
... print("Chunk:", data)
...
>>> rapidjson.dump(data, Stream(), chunk_size=5)
Chunk: b'{"foo'
Chunk: b'":100'
Chunk: b',"bar'
Chunk: b'":"ba'
Chunk: b'z"}'

Development
-----------

If you want to install the development version (maybe to contribute fixes or
enhancements) you may clone the repository:

.. code-block:: bash

$ git clone --recursive https://github.com/python-rapidjson/python-rapidjson.git

.. note:: The ``--recursive`` option is needed because we use a *submodule* to
include RapidJSON_ sources. Alternatively you can do a plain
``clone`` immediately followed by a ``git submodule update --init``.

Alternatively, if you already have (a *compatible* version of)
RapidJSON includes around, you can compile the module specifying
their location with the option ``--rj-include-dir``, for example:

.. code-block:: shell

$ python3 setup.py build --rj-include-dir=/usr/include/rapidjson

A set of makefiles implement most common operations, such as *build*, *check*
and *release*; see ``make help`` output for a list of available targets.

Performance
-----------

``python-rapidjson`` tries to be as performant as possible while staying
compatible with the ``json`` module.

See `this section`__ in the documentation for a comparison with other JSON libraries.

__ https://python-rapidjson.readthedocs.io/en/latest/benchmarks.html

Incompatibility
---------------

Although we tried to implement an API similar to the standard library ``json``, being a
strict *drop-in* replacement in not our goal and we have decided to depart from there in
some aspects. See `this section`__ in the documentation for further details.

__ https://python-rapidjson.readthedocs.io/en/latest/quickstart.html#incompatibilities

.. _RapidJSON: http://rapidjson.org/