What is Python's asyncio and how can I use it for concurrent programming?

What is Python's asyncio and how can I use it for concurrent programming?

Python's asyncio is a library used to write 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 an example of how to use asyncio?

Sure! Here's a simple example:

import asyncio

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

async def main():
    await asyncio.gather(say_hello(), 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.

Are there any limitations to using asyncio?

Yes, asyncio is best suited for I/O-bound tasks. It may not provide performance benefits for CPU-bound tasks, where threading or multiprocessing might be more appropriate.