What is asyncio in Python and how do I use it?

What is asyncio in Python and how do I use it?

Asyncio is a library in Python 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!')

asyncio.run(say_hello())

What does the await keyword do?

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

How can I run multiple coroutines at once?

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

await asyncio.gather(coroutine1(), coroutine2())