What is Python asyncio and how do I use it?

What is Python asyncio and how do I use it?

Python asyncio is a library used for writing concurrent code using the async/await syntax. It allows you to run multiple tasks at the same time without blocking the main thread.

Can you give me a simple example of using asyncio?

Sure! Here's a basic example:

import asyncio

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

async def main():
    await say_hello()

asyncio.run(main())

What does the await keyword do in this context?

The await keyword is used to pause the execution of the coroutine until the awaited task is complete, allowing other tasks to run in the meantime.

How can I run multiple coroutines concurrently?

You can use asyncio.gather() to run multiple coroutines concurrently. For example:

await asyncio.gather(say_hello(), say_hello())