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<a href="https://asyncer.tiangolo.com"><img src="https://asyncer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" alt="Asyncer"></a>
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<em>Asyncer, async and await, focused on developer experience.</em>
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---
**Documentation**: <a href="https://asyncer.tiangolo.com" target="_blank">https://asyncer.tiangolo.com</a>
**Source Code**: <a href="https://github.com/tiangolo/asyncer" target="_blank">https://github.com/tiangolo/asyncer</a>
---
**Asyncer** is a small library built on top of <a href="https://anyio.readthedocs.io/en/stable/" class="external-link" target="_blank">AnyIO</a>.
**Asyncer** has a small number of utility functions that allow working with `async`, `await`, and concurrent code in a more convenient way under my (<a href="https://twitter.com/tiangolo" class="external-link" target="_blank">@tiangolo - Sebastián Ramírez</a>) very opinionated and subjective point of view.
The main goal of **Asyncer** is to improve **developer experience** by providing better support for **autocompletion** and **inline errors** in the editor, and **more certainty** that the code is **bug-free** by providing better support for type checking tools like **mypy**.
**Asyncer** also tries to improve **convenience** and simplicity when working with **async** code **mixed** with regular <abbr title="synchronous code, code that is not async">**blocking code**</abbr>, allowing to use them together in a simpler way... again, under my very **subjective** point of view.
## 🚨 Warning
This small library only exists to be able to use these **utility functions** until (and if) they are integrated into **AnyIO**.
It will probably take some time for that to happen (or to be decided if it will be included or not).
So I made this to be able to use these ideas right now. 🤓
## Can I Use It?
Yes 🎉 (but continue reading).
You can use this and evaluate the **library API design** I'm proposing. It will probably be useful to know if it works and is useful for you (I hope so).
But still, consider this lab material, expect it to change a bit. 🧪
If you use it, **pin the exact Asyncer version** for your project, to make sure it all works.
Have **tests** for your project (as you should, anyway). And **upgrade the version** once you know that the new version continues to work correctly.
Still, it's **just 4 functions**, so there's not much to change, if you had to refactor your code to update something it would not be much.
And if you don't want to add `asyncer` as a dependency to your project, you can also just copy the main file and try out those functions, it's quite small (but in that case you won't get updates easily).
## Requirements
As **Asyncer** is based on **AnyIO** it will be also installed automatically when you install **Asyncer**.
## Installation
<div class="termy">
```console
$ pip install asyncer
---> 100%
Successfully installed asyncer anyio
```
</div>
## How to Use
You can read more about each of the use cases and utility functions in **Asyncer** in the <a href="https://asyncer.tiangolo.com/tutorial/" class="external-link" target="_blank">tutorial</a>.
As a sneak preview of one of the utilities, you can **call sync code from async code** using `asyncify()`:
```Python
import time
import anyio
from asyncer import asyncify
def do_sync_work(name: str):
time.sleep(1)
return f"Hello, {name}"
async def main():
message = await asyncify(do_sync_work)(name="World")
print(message)
anyio.run(main)
```
**Asyncer**'s `asyncify()` will use AnyIO underneath to do *the smart thing*, avoid blocking the main **async** event loop, and run the **sync**/blocking function in a **worker thread**.
### Editor Support
Everything in **Asyncer** is designed to get the best **developer experience** possible, with the best editor support.
* **Autocompletion** for function arguments:
<img class="shadow" src="https://asyncer.tiangolo.com/img/tutorial/asyncify/image01.png">
* **Autocompletion** for return values:
<img class="shadow" src="https://asyncer.tiangolo.com/img/tutorial/asyncify/image02.png">
* **Inline errors** in editor:
<img class="shadow" src="https://asyncer.tiangolo.com/img/tutorial/soonify/image02.png">
* Support for tools like **mypy**, that can help you verify that your **code is correct**, and prevent many bugs.
## License
This project is licensed under the terms of the [MIT license](https://github.com/tiangolo/asyncer/blob/main/LICENSE).