https://github.com/PetterS/quickjs

Thin Python wrapper of https://bellard.org/quickjs/
https://github.com/PetterS/quickjs

javascript python python-library

Last synced: about 2 months ago
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Thin Python wrapper of https://bellard.org/quickjs/

• Host: GitHub
• URL: https://github.com/PetterS/quickjs
• Owner: PetterS
• License: mit
• Created: 2019-07-15T07:24:26.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2024-04-12T03:22:45.000Z (5 months ago)
• Last Synced: 2024-07-19T01:01:41.842Z (2 months ago)
• Topics: javascript, python, python-library
• Language: Python
• Homepage: https://github.com/bellard/QuickJS
• Size: 1.15 MB
• Stars: 173
• Watchers: 14
• Forks: 18
• Open Issues: 32
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
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Just install with

	pip install quickjs

Binaries are provided for:

 - 1.19.2 and later: Python 3.7-3.10, 64-bit for Windows, macOS and GNU/Linux.

 - 1.18.0-1.19.1: None.

 - 1.5.1–1.17.0: Python 3.9, 64-bit for Windows.

 - 1.5.0 and earlier: Python 3.7, 64-bit for Windows.

# Usage

```python

from quickjs import Function

f = Function("f", """

    function adder(a, b) {

        return a + b;

    }

    

    function f(a, b) {

        return adder(a, b);

    }

    """)

assert f(1, 2) == 3

```

Simple types like int, floats and strings are converted directly. Other types (dicts, lists) are converted via JSON by the `Function` class.

The library is thread-safe if `Function` is used. If the `Context` class is used directly, it can only ever be accessed by the same thread.

This is true even if the accesses are not concurrent.

Both `Function` and `Context` expose `set_memory_limit` and `set_time_limit` functions that allow limits for code running in production.

## API

The `Function` class has, apart from being a callable, additional methods:

- `set_memory_limit`

- `set_time_limit`

- `set_max_stack_size`

- `memory` – returns a dict with information about memory usage.

- `add_callable` – adds a Python function and makes it callable from JS.

- `execute_pending_job` – executes a pending job (such as a async function or Promise).

## Documentation

For full functionality, please see `test_quickjs.py`

# Developing

This project uses a git submodule for the upstream code, so clone it with the `--recurse-submodules` option or run `git submodule update --init --recursive` afterwards.

Use a `poetry shell` and `make test` should work from inside its virtual environment.