jsonschema-rs
=============
|Build| |Version| |Python versions| |License|
Fast JSON Schema validation for Python implemented in Rust.
Supported drafts:
- Draft 7
- Draft 6
- Draft 4
There are some notable restrictions at the moment:
- The underlying crate doesn't support arbitrary precision integers yet, which may lead to ``SystemError`` when such value is used;
- ``multipleOf`` keyword validation may produce false-negative results on some input. See `#84 <https://github.com/Stranger6667/jsonschema-rs/issues/84>`_ for more details
Installation
------------
To install ``jsonschema-rs`` via ``pip`` run the following command:
.. code:: bash
pip install jsonschema-rs
Usage
-----
To check if the input document is valid:
.. code:: python
import jsonschema_rs
validator = jsonschema_rs.JSONSchema({"minimum": 42})
validator.is_valid(45) # True
or:
.. code:: python
import jsonschema_rs
validator = jsonschema_rs.JSONSchema({"minimum": 42})
validator.validate(41) # raises ValidationError
**NOTE**. This library is in early development.
Performance
-----------
According to our benchmarks, ``jsonschema-rs`` is usually faster than existing alternatives in real-life scenarios.
However, for single-keyword or boolean schemas it might be slower than ``fastjsonschema``.
Compiled validators (when the input schema is compiled once and reused later)
+----------------+------------------------+-----------------------+-------------------------+-------------------------+
| library | ``false`` | ``{"minimum": 10}`` | small | big |
+================+========================+=======================+=========================+=========================+
| jsonschema-rs | 141.45 ns | 144.66 ns | 652.84 ns | 4.89 ms |
+----------------+------------------------+-----------------------+-------------------------+-------------------------+
| fastjsonschema | 48.92 ns (**x0.34**) | 95.22 ns (**x0.65**) | 3.91 us (**x6**) | 554.74 ms (**x113.44**) |
+----------------+------------------------+-----------------------+-------------------------+-------------------------+
| jsonschema | 204.94 ns (**x1.44**) | 1.52 us (**10.54**) | 57.44 us (**x88**) | 1.38 s (**x282.41**) |
+----------------+------------------------+-----------------------+-------------------------+-------------------------+
Validators are not compiled (``jsonschema``) or compiled on every validation:
+----------------+------------------------+-------------------------+-------------------------+-------------------------+
| library | ``false`` | ``{"minimum": 10}`` | small | big |
+================+========================+=========================+=========================+=========================+
| jsonschema-rs | 328.86 ns | 448.03 ns | 6.39 us | 4.89 ms |
+----------------+------------------------+-------------------------+-------------------------+-------------------------+
| fastjsonschema | 55.29 us (**x168.07**) | 106.01 us (**x236.6**) | 1.3 ms (**x204.53**) | 557.35 ms (**x113.97**) |
+----------------+------------------------+-------------------------+-------------------------+-------------------------+
| jsonschema | 45.95 us (**x139.69**) | 54.68 us (**x122.06**) | 758.8 us (**x118.74**) | 1.43 s (**x292.43**) |
+----------------+------------------------+-------------------------+-------------------------+-------------------------+
The bigger the input is the bigger is performance win.
In the examples below, ``big`` and ``small`` schemas refer to more realistic schemas and input instances.
You can take a look at benchmarks in ``benches/bench.py``. Ratios are given against ``jsonschema-rs``.
Measured with stable Rust 1.44.1, Python 3.8.3 on i8700K (12 cores), 32GB RAM, Arch Linux.
Python support
--------------
``jsonschema-rs`` supports Python 3.6, 3.7, 3.8 and 3.9.
License
-------
The code in this project is licensed under `MIT license`_.
By contributing to ``jsonschema-rs``, you agree that your contributions
will be licensed under its MIT license.
.. |Build| image:: https://github.com/Stranger6667/jsonschema-rs/workflows/ci/badge.svg
:target: https://github.com/Stranger6667/jsonschema-rs/actions
.. |Version| image:: https://img.shields.io/pypi/v/jsonschema-rs.svg
:target: https://pypi.org/project/jsonschema-rs/
.. |Python versions| image:: https://img.shields.io/pypi/pyversions/jsonschema-rs.svg
:target: https://pypi.org/project/jsonschema-rs/
.. |License| image:: https://img.shields.io/pypi/l/jsonschema-rs.svg
:target: https://opensource.org/licenses/MIT
.. _MIT license: https://opensource.org/licenses/MIT
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