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# Awesome asyncio

> A carefully curated list of awesome Python asyncio frameworks, libraries, software and resources.

The Python asyncio module introduced to the standard library with Python 3.4 provides infrastructure for writing single-threaded concurrent code using coroutines, multiplexing I/O access over sockets and other resources, running network clients and servers, and other related primitives.

Asyncio is not really a brand-new technology however it appears to be very trending since a few years - especially in the Python community and with the release of Python 3.4 in March 2014. Thus, it’s pretty hard to keep yourself up-to-date with the most awesome packages out there. Find some of those awesome packages here and if you are missing one we count on you to create an Issue or a Pull Request with your suggestion.

## Contents

- Web Frameworks
- Message Queues
- Database Drivers
- Networking
- GraphQL
- Testing
- Alternative Loops
- Misc
- Writings
- Talks
- Alternatives to asyncio

## Web Frameworks

Libraries to build web applications.

- FastAPI - A very high performance Python 3.6+ API framework based on type hints. Powered by Starlette and Pydantic.
- Django - An established, high-level Python web framework with a huge community and ecosystem.
- Starlette - A lightweight ASGI framework/toolkit for building high performance services.
- aiohttp - Http client/server for asyncio (PEP-3156).
- sanic - Python 3.5+ web server that’s written to go fast.
- Quart - An asyncio web microframework with the same API as Flask.
- autobahn - WebSocket and WAMP supporting asyncio and Twisted, for clients and servers.
- websockets - A library for building WebSocket servers and clients in Python with a focus on correctness and simplicity.
- Tornado - Performant web framework and asynchronous networking library.
- uvicorn - The lightning-fast ASGI server.

## Message Queues

Libraries to implement applications using message queues.

- aioamqp - AMQP implementation using asyncio.
- pyzmq - Python bindings for ZeroMQ.
- aiozmq - Alternative Asyncio integration with ZeroMQ.
- crossbar - Crossbar.io is a networking platform for distributed and microservice applications.
- asyncio-nats - Client for the NATS messaging system.
- aiokafka - Client for Apache Kafka.

## Database Drivers

Libraries to connect to databases.

- asyncpg - Fast PostgreSQL Database Client Library for Python/asyncio.
- asyncpgsa - Asyncpg with sqlalchemy core support.
- aiopg - Library for accessing a PostgreSQL database.
- aiomysql - Library for accessing a MySQL database
- aioodbc - Library for accessing a ODBC databases.
- motor - The async Python driver for MongoDB.
- redis-py - Redis Python Client (which includes aioreadis now).
- aiocouchdb - CouchDB client built on top of aiohttp (asyncio).
- aioinflux - InfluxDB client built on top of aiohttp.
- aioes - Asyncio compatible driver for elasticsearch.
- peewee-async - ORM implementation based on peewee and aiopg.
- GINO - is a lightweight asynchronous Python ORM based on SQLAlchemy core, with asyncpg dialect.
- Tortoise ORM - native multi-backend ORM with Django-like API and easy relations management.
- Databases - Async database access for SQLAlchemy core, with support for PostgreSQL, MySQL, and SQLite.
- Prisma Client Python - An auto-generated, fully type safe ORM powered by Pydantic and tailored specifically for your schema - supports SQLite, PostgreSQL, MySQL, MongoDB, MariaDB and more.
- Piccolo - An ORM / query builder which can work in async and sync modes, with a nice admin GUI, and ASGI middleware.
- Beanie - An async MongoDB ODM built on motor and Pydantic.

## Networking

Libraries to communicate in your network.

- AsyncSSH - Provides an asynchronous client and server implementation of the SSHv2 protocol.
- aiodns - Simple DNS resolver for asyncio.
- aioping - Fast asyncio implementation of ICMP (ping) protocol.
- httpx - asynchronous HTTP client for Python 3 with requests compatible API.

## GraphQL

Libraries to build GraphQL servers.

- Ariadne - Schema-first Python library for implementing GraphQL servers.
- Tartiflette - Schema-first Python 3.6+ GraphQL engine built on top of `libgraphqlparser`.
- Strawberry - Code-first Python 3 GraphQL server with Django, Flask and FastAPI/Starlette support.

## Testing

Libraries to test asyncio based applications.

- aiomock - A python mock library that supports async methods.
- asynctest - Enhance the standard unittest package with features for testing. asyncio libraries
- pytest-asyncio - Pytest support for asyncio.
- aresponses - Asyncio http mocking. Similar to the responses library used for requests.
- aioresponses - Helper for mock/fake web requests in Python aiohttp package.

## Alternative Loops

Alternative asyncio loop implementations.

- uvloop - Ultra fast implementation of asyncio event loop on top of libuv.

## Misc

Other awesome asyncio libraries.

- aiochan - CSP-style concurrency with channels, select and multiprocessing on top of asyncio.
- aiocache - Cache manager for different backends.
- aiofiles - File support for asyncio.
- aiopath - Asynchronous `pathlib` for asyncio.
- aiodebug - A tiny library for monitoring and testing asyncio programs.
- aiorun - A `run()` function that handles all the usual boilerplate for startup and graceful shutdown.
- aiosc - Lightweight Open Sound Control implementation.
- aioserial - A drop-in replacement of pySerial.
- aiozipkin - Distributed tracing instrumentation for asyncio with zipkin
- asgiref - Backend utils for ASGI to WSGI integration, includes sync_to_async and async_to_sync function wrappers.
- async_property - Python decorator for async properties.
- ruia - An async web scraping micro-framework based on asyncio.
- kubernetes_asyncio - Asynchronous client library for Kubernetes.
- aiomisc - Miscellaneous utils for `asyncio`.
- taskiq - Asynchronous distributed task manager (like celery, but async).

## Writings

Documentation, blog posts, and other awesome writing about asyncio.

- Official asyncio documentation - Asynchronous I/O, event loop, coroutines and tasks.
- Short well-written intro to asyncio - Generators, Coroutines, Native Coroutines and async/await.
- AsyncIO for the Working Python Developer - A gentle introduction to asynchronous programming from basic examples working up to URL fetching.
- Test limits of Python aiohttp - Making 1 million requests with python-aiohttp.
- ASGI (Asynchronous Server Gateway Interface) - A spiritual successor to WSGI, intended to provide a standard interface between async-capable Python web servers, frameworks, and applications.
- First Principles Introduction to Asyncio - A no-buzzword first principles introduction to the internal workings of asyncio.
- Developing and Testing an Asynchronous API with FastAPI and Pytest - This tutorial looks at how to develop and test an asynchronous API with FastAPI using Test-Driven Development (TDD).
- Python Concurrency with asyncio - Learn how to speed up slow Python code with concurrent programming and the cutting-edge asyncio library.

## Talks

Recordings of awesome talks about asyncio.

- Topics of Interest (Python Asyncio) | screencast | slides - PyCon Brasil 2015 keynote (David Beazley).
- Python Asynchronous I/O Walkthrough - 8-part code walkthrough (Philip Guo).
- Async/await in Python 3.5 and why it is awesome - EuroPython 2016 (Yury Selivanov).
- Fear and Awaiting in Async: A Savage Journey to the Heart of the Coroutine Dream | screencast - PyOhio 2016 keynote (David Beazley).
- Asynchronous Python for the Complete Beginner | slides - PyCon 2017 (Miguel Grinberg).
- Demystifying Python’s Async and Await Keywords - JetBrains TV 2020 (Michael Kennedy)

## Alternatives to asyncio

Alternative approaches to async programming in Python, some of which attempt to support some compatibility with `asyncio`, others are not compatible at all.

- curio - The coroutine concurrency library.
  - Curio-Asyncio Bridge - basic curio -> asyncio coroutine bridge.
- trio - Pythonic async I/O for humans and snake people.
  - trio-asyncio - re-implementation of the asyncio mainloop on top of Trio.
- AnyIO - High level asynchronous concurrency and networking framework that works on top of either trio or asyncio.

asyncio.md Github