Fast JSON Schema validation for Python implemented in Rust

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  • License: MIT License (MIT)
  • Author: Dmitry Dygalo
  • Maintainer: Dmitry Dygalo
  • Tags jsonschema, validation, rust
  • Requires: Python >=3.5
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Reason this release was yanked:

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Project description

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 for more details

Installation

To install jsonschema-rs via pip run the following command:

pip install jsonschema-rs

Usage

To check if the input document is valid:

import jsonschema_rs

validator = jsonschema_rs.JSONSchema({"minimum": 42})
validator.is_valid(45)  # True

or:

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

273.01 ns

263.29 ns

904.38 ns

4.96 ms

fastjsonschema

49.77 ns (x0.18)

130.21 ns (x0.49)

5.7 us (x6.31)

575.66 ms (x115.84)

jsonschema

278.27 ns (x1.01)

2.41 us (x9.15)

75.27 us (x83.23)

1.83 s (x368.47)

Validators are not compiled (jsonschema) or compiled on every validation:

library

false

{"minimum": 10}

small

big

jsonschema-rs

349.74 ns

465.67 ns

6.97 us

5.15 ms

fastjsonschema

62.46 us (x178.59)

112.64 us (x241.9)

1.33 ms (x191.67)

574.5 ms (x111.55)

jsonschema

64.57 us (x184.64)

74.2 us (x159.34)

951.38 us (x136.37)

1.85 s (x360.38)

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.

Python support

jsonschema-rs supports Python 3.5, 3.6, 3.7 and 3.8.

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.

Project details

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  • License: MIT License (MIT)
  • Author: Dmitry Dygalo
  • Maintainer: Dmitry Dygalo
  • Tags jsonschema, validation, rust
  • Requires: Python >=3.5
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