Async IO in Python: Trio vs. Asyncio

Python developers have two main options for asynchronous I/O concurrency - asyncio and Trio. Both allow you to write non-blocking, concurrent code in Python. But which one is better for your use case?

How They Work

Fundamentally, asyncio and Trio work very similarly:

import asyncio

async def main():
    print('Hello')
    await asyncio.sleep(1)
    print('World')

asyncio.run(main())

import trio

async def main():
    print('Hello')
    await trio.sleep(1) 
    print('World')

trio.run(main)

They both provide an event loop and async/await syntax to allow non-blocking calls.

Key Differences

Some key differences:

Use Cases

Asyncio makes sense if you need integration with a library that doesn't support Trio, or you want something that comes built-in to Python.

Trio is a good choice for newer applications that are I/O bound. Its design addresses pain points from asyncio.

Key Takeaways

Choose based on your specific needs - or try them both!