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Metadata-Version: 2.4
Name: ujson
Version: 5.11.0
Summary: Ultra fast JSON encoder and decoder for Python
Home-page: https://github.com/ultrajson/ultrajson
Download-URL: https://github.com/ultrajson/ultrajson
Author: Jonas Tarnstrom
Project-URL: Source, https://github.com/ultrajson/ultrajson
Platform: any
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: C
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.9
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: Typing :: Typed
Requires-Python: >=3.9
Description-Content-Type: text/markdown
License-File: LICENSE.txt
Dynamic: download-url
Dynamic: license-file
# UltraJSON
[![PyPI version](https://img.shields.io/pypi/v/ujson.svg?logo=pypi&logoColor=FFE873)](https://pypi.org/project/ujson)
[![Supported Python versions](https://img.shields.io/pypi/pyversions/ujson.svg?logo=python&logoColor=FFE873)](https://pypi.org/project/ujson)
[![PyPI downloads](https://img.shields.io/pypi/dm/ujson.svg)](https://pypistats.org/packages/ujson)
[![GitHub Actions status](https://github.com/ultrajson/ultrajson/workflows/Test/badge.svg)](https://github.com/ultrajson/ultrajson/actions)
[![codecov](https://codecov.io/gh/ultrajson/ultrajson/branch/main/graph/badge.svg)](https://codecov.io/gh/ultrajson/ultrajson)
[![DOI](https://zenodo.org/badge/1418941.svg)](https://zenodo.org/badge/latestdoi/1418941)
[![Code style: Black](https://img.shields.io/badge/code%20style-Black-000000.svg)](https://github.com/psf/black)
UltraJSON is an ultra fast JSON encoder and decoder written in pure C with bindings for
Python 3.9+.
Install with pip:
```sh
python -m pip install ujson
```
## Project status
> [!WARNING]
> UltraJSON's architecture is fundamentally ill-suited to making changes without
> risk of introducing new security vulnerabilities. As a result, this library
> has been put into a *maintenance-only* mode. Support for new Python versions
> will be added and critical bugs and security issues will still be
> fixed but all other changes will be rejected. Users are encouraged to migrate
> to [orjson](https://pypi.org/project/orjson/) which is both much faster and
> less likely to introduce a surprise buffer overflow vulnerability in the
> future.
## Usage
May be used as a drop in replacement for most other JSON parsers for Python:
```pycon
>>> import ujson
>>> ujson.dumps([{"key": "value"}, 81, True])
'[{"key":"value"},81,true]'
>>> ujson.loads("""[{"key": "value"}, 81, true]""")
[{'key': 'value'}, 81, True]
```
### Encoder options
#### encode_html_chars
Used to enable special encoding of "unsafe" HTML characters into safer Unicode
sequences. Default is `False`:
```pycon
>>> ujson.dumps("<script>John&Doe", encode_html_chars=True)
'"\\u003cscript\\u003eJohn\\u0026Doe"'
```
#### ensure_ascii
Limits output to ASCII and escapes all extended characters above 127. Default is `True`.
If your end format supports UTF-8, setting this option to false is highly recommended to
save space:
```pycon
>>> ujson.dumps("åäö")
'"\\u00e5\\u00e4\\u00f6"'
>>> ujson.dumps("åäö", ensure_ascii=False)
'"åäö"'
```
#### escape_forward_slashes
Controls whether forward slashes (`/`) are escaped. Default is `True`:
```pycon
>>> ujson.dumps("https://example.com")
'"https:\\/\\/example.com"'
>>> ujson.dumps("https://example.com", escape_forward_slashes=False)
'"https://example.com"'
```
#### indent
Controls whether indentation ("pretty output") is enabled. Default is `0` (disabled):
```pycon
>>> ujson.dumps({"foo": "bar"})
'{"foo":"bar"}'
>>> print(ujson.dumps({"foo": "bar"}, indent=4))
{
"foo": "bar"
}
```
## Benchmarks
*UltraJSON* calls/sec compared to other popular JSON parsers with performance gain
specified below each.
### Test machine
Linux 5.15.0-1037-azure x86_64 #44-Ubuntu SMP Thu Apr 20 13:19:31 UTC 2023
### Versions
- CPython 3.11.3 (main, Apr 6 2023, 07:55:46) [GCC 11.3.0]
- ujson : 5.7.1.dev26
- orjson : 3.9.0
- simplejson : 3.19.1
- json : 2.0.9
| | ujson | orjson | simplejson | json |
|-------------------------------------------------------------------------------|-----------:|-----------:|-----------:|-----------:|
| Array with 256 doubles | | | | |
| encode | 18,282 | 79,569 | 5,681 | 5,935 |
| decode | 28,765 | 93,283 | 13,844 | 13,367 |
| Array with 256 UTF-8 strings | | | | |
| encode | 3,457 | 26,437 | 3,630 | 3,653 |
| decode | 3,576 | 4,236 | 522 | 1,978 |
| Array with 256 strings | | | | |
| encode | 44,769 | 125,920 | 21,401 | 23,565 |
| decode | 28,518 | 75,043 | 41,496 | 42,221 |
| Medium complex object | | | | |
| encode | 11,672 | 47,659 | 3,913 | 5,729 |
| decode | 12,522 | 23,599 | 8,007 | 9,720 |
| Array with 256 True values | | | | |
| encode | 110,444 | 425,919 | 81,428 | 84,347 |
| decode | 203,430 | 318,193 | 146,867 | 156,249 |
| Array with 256 dict{string, int} pairs | | | | |
| encode | 14,170 | 72,514 | 3,050 | 7,079 |
| decode | 19,116 | 27,542 | 9,374 | 13,713 |
| Dict with 256 arrays with 256 dict{string, int} pairs | | | | |
| encode | 55 | 282 | 11 | 26 |
| decode | 48 | 53 | 27 | 34 |
| Dict with 256 arrays with 256 dict{string, int} pairs, outputting sorted keys | | | | |
| encode | 42 | | 8 | 27 |
| Complex object | | | | |
| encode | 462 | | 397 | 444 |
| decode | 480 | 618 | 177 | 310 |
Above metrics are in call/sec, larger is better.
## Build options
For those with particular needs, such as Linux distribution packagers, several
build options are provided in the form of environment variables.
### Debugging symbols
#### UJSON_BUILD_NO_STRIP
By default, debugging symbols are stripped on Linux platforms. Setting this
environment variable with a value of `1` or `True` disables this behavior.
### Using an external or system copy of the double-conversion library
These two environment variables are typically used together, something like:
```sh
export UJSON_BUILD_DC_INCLUDES='/usr/include/double-conversion'
export UJSON_BUILD_DC_LIBS='-ldouble-conversion'
```
Users planning to link against an external shared library should be aware of
the ABI-compatibility requirements this introduces when upgrading system
libraries or copying compiled wheels to other machines.
#### UJSON_BUILD_DC_INCLUDES
One or more directories, delimited by `os.pathsep` (same as the `PATH`
environment variable), in which to look for `double-conversion` header files;
the default is to use the bundled copy.
#### UJSON_BUILD_DC_LIBS
Compiler flags needed to link the `double-conversion` library; the default
is to use the bundled copy.