Metadata-Version: 2.4
Name: async-kernel
Version: 0.12.3
Summary: A concurrent python kernel for Jupyter supporting AnyIO, AsyncIO and Trio.
Project-URL: Homepage, https://fleming79.github.io/async-kernel
Project-URL: Documentation, https://fleming79.github.io/async-kernel
Project-URL: Source, https://github.com/fleming79/async-kernel
Project-URL: Tracker, https://github.com/fleming79/async-kernel/issues
Project-URL: Changelog, https://fleming79.github.io/async-kernel/latest/about/changelog/
Author-email: Alan Fleming <async-python@proton.me>
License-Expression: MIT
License-File: IPYTHON_LICENSE
License-File: LICENSE
Keywords: Interactive,Interpreter,Jupyter,Shell,Web
Classifier: Development Status :: 4 - Beta
Classifier: Framework :: AnyIO
Classifier: Framework :: AsyncIO
Classifier: Framework :: Jupyter
Classifier: Framework :: Jupyter :: JupyterLab
Classifier: Framework :: Jupyter :: JupyterLab :: 4
Classifier: Framework :: Jupyter :: JupyterLab :: Extensions
Classifier: Framework :: Jupyter :: JupyterLab :: Extensions :: Prebuilt
Classifier: Framework :: Trio
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Science/Research
Classifier: Intended Audience :: System Administrators
Classifier: Programming Language :: Python
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: >=3.11
Requires-Dist: aiologic>=0.16.0
Requires-Dist: anyio>=4.12
Requires-Dist: comm>=0.2
Requires-Dist: ipython>=9.0
Requires-Dist: jupyter-client>=8.8; sys_platform != 'emscripten'
Requires-Dist: jupyter-core>=5.9.1
Requires-Dist: matplotlib-inline>0.1
Requires-Dist: orjson>=3.10.16
Requires-Dist: outcome; sys_platform != 'emscripten'
Requires-Dist: pyzmq>=27.0; sys_platform != 'emscripten'
Requires-Dist: sniffio>=1.3.0; sys_platform != 'emscripten'
Requires-Dist: traitlets>=5.14
Requires-Dist: typing-extensions>=4.14
Requires-Dist: wrapt>=2.0.1
Description-Content-Type: text/markdown

# Async kernel

[![pypi](https://img.shields.io/pypi/pyversions/async-kernel.svg)](https://pypi.python.org/pypi/async-kernel)
[![downloads](https://img.shields.io/pypi/dm/async-kernel?logo=pypi&color=3775A9)](https://pypistats.org/packages/async-kernel)
[![CI](https://github.com/fleming79/async-kernel/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/fleming79/async-kernel/actions/workflows/ci.yml)
[![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
[![uv](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/uv/main/assets/badge/v0.json)](https://github.com/astral-sh/uv)
[![basedpyright - checked](https://img.shields.io/badge/basedpyright-checked-42b983)](https://docs.basedpyright.com)
[![Built with Material for MkDocs](https://img.shields.io/badge/Material_for_MkDocs-526CFE?style=plastic&logo=MaterialForMkDocs&logoColor=white)](https://squidfunk.github.io/mkdocs-material/)
[![codecov](https://codecov.io/github/fleming79/async-kernel/graph/badge.svg?token=PX0RWNKT85)](https://codecov.io/github/fleming79/async-kernel)

![logo-svg](https://github.com/user-attachments/assets/6781ec08-94e9-4640-b8f9-bb07a08e9587)

Async kernel is a Python [Jupyter](https://docs.jupyter.org/en/latest/projects/kernels.html#kernels-programming-languages) kernel
with concurrent message handling.

Messages are processed fairly whilst preventing asynchronous deadlocks by using
a unique message handler per `channel`, `message_type` and `subshell_id`.

## Highlights

- [Experimental](https://github.com/fleming79/echo-kernel) support for
  [Jupyterlite](https://github.com/jupyterlite/jupyterlite) try it online [here](https://fleming79.github.io/echo-kernel/) 👈
- [Debugger client](https://jupyterlab.readthedocs.io/en/latest/user/debugger.html#debugger)
- [anyio](https://pypi.org/project/anyio/) compatible event loops
    - [`asyncio`](https://docs.python.org/3/library/asyncio.html) (default)
    - [`trio`](https://pypi.org/project/trio/)
- [aiologic](https://aiologic.readthedocs.io/latest/) thread-safe synchronisation primitives
- [Easy multi-thread / multi-event loop management](https://fleming79.github.io/async-kernel/latest/reference/caller/#async_kernel.caller.Caller)
- [IPython shell](https://ipython.readthedocs.io/en/stable/overview.html#enhanced-interactive-python-shell)
- Per-subshell user_ns
- GUI event loops [^gui note][^gui caller note]
    - [x] inline
    - [x] ipympl
    - [x] tk with asyncio[^asyncio guest] or trio backend running as a guest
    - [x] qt with asyncio[^asyncio guest] or trio backend running as a guest

[^gui note]: A gui event loop is provided by starting the event loop (_host_)
and then running an asynchronous backend as a guest in the event loop. Kernel
messaging is performed as usual in the asynchronous backend. For this reason
it is not possible to enable a gui event loop at runtime.

[^gui caller note]: It is also possible to use a caller to run a gui event loop
in a separate thread (with a backend running as a guest) if the gui allows it
(qt will only run in the main thread). Also note that pyplot will only permit
one interactive gui library in a process.

[^asyncio guest]: The asyncio implementation of `start_guest_run` was written by
[the author of aiologic](https://github.com/x42005e1f/aiologic) and provided as a
([gist](https://gist.github.com/x42005e1f/857dcc8b6865a11f1ffc7767bb602779)).

**[Documentation](https://fleming79.github.io/async-kernel/)**

## Installation

```bash
pip install async-kernel
```

## Kernel specs

A kernel spec with the name 'async' is added when async kernel is installed.

Kernel specs can be added/removed via the command line.

The kernel is configured via the interface with the options:

- [`interface.backend`](#backends)
- `interface.backend_options`
- `interface.loop`
- `interface.loop_options`

### Backends

The backend defines the asynchronous library provided in the thread in which it is running.

- asyncio
- trio

**Example - change kernel spec to use trio**

```bash
pip install trio
async-kernel -a async --interface.backend=trio
```

### Gui event loop

The kernel can be started with a gui event loop as the _host_ and the _backend_ running as a guest.

**asyncio backend**

```bash
# tk
async-kernel -a async-tk --interface.loop=tk

# qt
pip install PySide6-Essentials
async-kernel -a async-qt --interface.loop=qt
```

**trio backend**

```bash
pip install trio
# tk
async-kernel -a async-tk --interface.loop=tk --interface.backend=trio

# qt
pip install PySide6-Essentials
async-kernel -a async-qt --interface.loop=qt --interface.backend=trio
```

For further detail about kernel spec customisation see [command line usage](https://fleming79.github.io/async-kernel/latest/commands/#command-line).

## Origin

Async kernel started as a [fork](https://github.com/ipython/ipykernel/commit/8322a7684b004ee95f07b2f86f61e28146a5996d)
of [IPyKernel](https://github.com/ipython/ipykernel). Thank you to the original contributors of IPyKernel that made Async kernel possible.
