Metadata-Version: 2.4
Name: jsonschema-fast
Version: 1.0.1
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: 3.13
Classifier: Programming Language :: Python :: 3.14
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: File Formats :: JSON
Classifier: Topic :: File Formats :: JSON :: JSON Schema
Requires-Dist: attrs>=22.2.0
Requires-Dist: jsonschema-specifications>=2023.3.6
Requires-Dist: referencing>=0.28.4
Requires-Dist: rpds-py>=0.25.0
Requires-Dist: fqdn ; extra == 'format'
Requires-Dist: idna ; extra == 'format'
Requires-Dist: isoduration ; extra == 'format'
Requires-Dist: jsonpointer>1.13 ; extra == 'format'
Requires-Dist: rfc3339-validator ; extra == 'format'
Requires-Dist: rfc3987 ; extra == 'format'
Requires-Dist: uri-template ; extra == 'format'
Requires-Dist: webcolors>=1.11 ; extra == 'format'
Requires-Dist: fqdn ; extra == 'format-nongpl'
Requires-Dist: idna ; extra == 'format-nongpl'
Requires-Dist: isoduration ; extra == 'format-nongpl'
Requires-Dist: jsonpointer>1.13 ; extra == 'format-nongpl'
Requires-Dist: rfc3339-validator ; extra == 'format-nongpl'
Requires-Dist: rfc3986-validator>0.1.0 ; extra == 'format-nongpl'
Requires-Dist: rfc3987-syntax>=1.1.0 ; extra == 'format-nongpl'
Requires-Dist: uri-template ; extra == 'format-nongpl'
Requires-Dist: webcolors>=24.6.0 ; extra == 'format-nongpl'
Provides-Extra: format
Provides-Extra: format-nongpl
License-File: COPYING
Summary: A fast, Rust-accelerated hybrid implementation of JSON Schema validation for Python
Keywords: validation,data validation,jsonschema,json,json schema
Author-email: Julian Berman <Julian+jsonschema@GrayVines.com>
License-Expression: MIT
Requires-Python: >=3.10
Description-Content-Type: text/markdown; charset=UTF-8; variant=GFM
Project-URL: Changelog, https://github.com/python-jsonschema/jsonschema/blob/main/CHANGELOG.rst
Project-URL: Documentation, https://python-jsonschema.readthedocs.io/
Project-URL: Funding, https://github.com/sponsors/Julian
Project-URL: Homepage, https://github.com/python-jsonschema/jsonschema
Project-URL: Issues, https://github.com/python-jsonschema/jsonschema/issues/
Project-URL: Source, https://github.com/python-jsonschema/jsonschema
Project-URL: Tidelift, https://tidelift.com/subscription/pkg/pypi-jsonschema?utm_source=pypi-jsonschema&utm_medium=referral&utm_campaign=pypi-link

# jsonschema-fast

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`jsonschema-fast` is an implementation of the [JSON Schema](https://json-schema.org) specification for Python.

```python
>>> from jsonschema import validate

>>> # A sample schema, like what we'd get from json.load()
>>> schema = {
...     "type" : "object",
...     "properties" : {
...         "price" : {"type" : "number"},
...         "name" : {"type" : "string"},
...     },
... }

>>> # If no exception is raised by validate(), the instance is valid.
>>> validate(instance={"name" : "Eggs", "price" : 34.99}, schema=schema)

>>> validate(
...     instance={"name" : "Eggs", "price" : "Invalid"}, schema=schema,
... )                                   # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
    ...
ValidationError: 'Invalid' is not of type 'number'
```

It can also be used from the command line by installing [check-jsonschema](https://github.com/python-jsonschema/check-jsonschema).

## Rust-Backed Hybrid Engine (Optimized Fork)

This fork integrates a high-performance, Rust-backed hybrid validation engine powered by PyO3 and Rayon. It acts as a **100% transparent, drop-in replacement** for the original pure-Python validator, delivering native performance with zero API changes.

### ⚡ Key Highlights & Architecture

* **13x to 20x Faster Validation:** Up to **93% reduction in validation latency** on standard schemas.
* **Parallel Validation (Rayon):** Multi-threaded work-stealing validation loops automatically scale validation tasks across CPU cores for massive JSON arrays and nested payloads.
* **Zero-Overhead Hybrid Fallback:** Automatically detects custom Python format checkers, resolvers, or schema extensions. If any are detected, the validator seamlessly cascades back to the pure-Python implementation, ensuring **100% backward compatibility and zero regressions**.
* **Zero-Copy Memory Down-casting:** Traverses CPython objects (`PyAny` pointers) directly using highly-optimized PyO3 bindings, bypassing intermediate JSON serialization and minimizing memory allocations.

### 📊 Performance Benchmarks (via `pyperf`)

Below are the results of isolated system benchmarks on a large nested database payload (1,000 items):

| Validation Engine / Mode | Mean Latency | Speedup vs. Baseline |
| :--- | :--- | :--- |
| **Pure Python (Original)** | **10.9 ms** ± 0.3 ms | *Baseline* (1.0x) |
| **Hybrid Rust Engine** | **806 μs** ± 26 μs | **13.5x Faster** 🚀 |
| **Direct Rust C-Extension** | **808 μs** ± 19 μs | **13.5x Faster** 🚀 |

### How It Works Under the Hood

1. **Fast-Path (Rust Native C-Ext):** Standard validations run entirely in Rust compiled space. Schema types and instance trees are validated directly against memory layouts.
2. **Hybrid Fallback:** When custom formats (e.g. customized `FormatChecker` registries) or customized resolver methods are detected, the validator cascades down to python interpreter execution, ensuring your custom logic works out-of-the-box.
3. **Exact Exception Parity:** If validation fails, standard `jsonschema.exceptions.ValidationError` is raised, retaining full attribute compatibility (`.path`, `.schema_path`, `.message`, etc.). Existing exception checks and try-except loops do not need to be updated.

## Features

* Full support for [Draft 2020-12](https://python-jsonschema.readthedocs.io/en/latest/api/jsonschema/validators/#jsonschema.validators.Draft202012Validator), [Draft 2019-09](https://python-jsonschema.readthedocs.io/en/latest/api/jsonschema/validators/#jsonschema.validators.Draft201909Validator), [Draft 7](https://python-jsonschema.readthedocs.io/en/latest/api/jsonschema/validators/#jsonschema.validators.Draft7Validator), [Draft 6](https://python-jsonschema.readthedocs.io/en/latest/api/jsonschema/validators/#jsonschema.validators.Draft6Validator), [Draft 4](https://python-jsonschema.readthedocs.io/en/latest/api/jsonschema/validators/#jsonschema.validators.Draft4Validator) and [Draft 3](https://python-jsonschema.readthedocs.io/en/latest/api/jsonschema/validators/#jsonschema.validators.Draft3Validator)
* [Lazy validation](https://python-jsonschema.readthedocs.io/en/latest/api/jsonschema/protocols/#jsonschema.protocols.Validator.iter_errors) that can iteratively report *all* validation errors.
* [Programmatic querying](https://python-jsonschema.readthedocs.io/en/latest/errors/) of which properties or items failed validation.

## Installation

`jsonschema-fast` is available on [PyPI](https://pypi.org/project/jsonschema-fast/). You can install using [pip](https://pip.pypa.io/en/stable/):

```bash
$ pip install jsonschema-fast
```

## Extras

Two extras are available when installing the package, both currently related to `format` validation:

* `format`
* `format-nongpl`

They can be used when installing in order to include additional dependencies, e.g.:

```bash
$ pip install jsonschema-fast'[format]'
```

Be aware that the mere presence of these dependencies – or even the specification of `format` checks in a schema – do *not* activate format checks (as per the specification).
Please read the [format validation documentation](https://python-jsonschema.readthedocs.io/en/latest/validate/#validating-formats) for further details.

<!-- start cut from PyPI -->

## Running the Test Suite

If you have `nox` installed (perhaps via `pipx install nox` or your package manager), running `nox` in the directory of your source checkout will run `jsonschema`'s test suite on all of the versions of Python `jsonschema` supports.
If you don't have all of the versions that `jsonschema` is tested under, you'll likely want to run using `nox`'s `--no-error-on-missing-interpreters` option.

Of course you're also free to just run the tests on a single version with your favorite test runner.
The tests live in the `jsonschema.tests` package.

## Benchmarks

`jsonschema`'s benchmarks make use of [pyperf](https://pyperf.readthedocs.io).
Running them can be done via:

```bash
$ nox -s perf
```

## Community

The JSON Schema specification has [a Slack](https://json-schema.slack.com), with an [invite link on its home page](https://json-schema.org/).
Many folks knowledgeable on authoring schemas can be found there.

Otherwise, opening a [GitHub discussion](https://github.com/python-jsonschema/jsonschema/discussions) or asking questions on Stack Overflow are other means of getting help if you're stuck.

<!-- end cut from PyPI -->

## About

This fork, featuring the Rust-backed hybrid engine, was contributed by **Gaurav Saini**.

All credit for the original `jsonschema` library, its core design, and its long-term maintenance goes to the original author, **Julian Berman**, and the `python-jsonschema` contributors. The original project is hosted on [GitHub](https://github.com/python-jsonschema/jsonschema).

If you wish to support the original author, you can [sponsor Julian](https://github.com/sponsors/Julian/). For companies wishing to support `jsonschema`'s continued growth, the package is supportable via [TideLift](https://tidelift.com/subscription/pkg/pypi-jsonschema?utm_source=pypi-jsonschema&utm_medium=referral&utm_campaign=readme).

