How can I use asyncio for advanced concurrency in Python?

How can I use asyncio for advanced concurrency in Python?

You can use asyncio to manage concurrent tasks using coroutines, event loops, and tasks. What specific use case do you have in mind?

I want to handle multiple I/O-bound tasks simultaneously. Can you give me an example?

Sure! You can use asyncio.gather() to run multiple coroutines concurrently. Here's a simple example:

import asyncio

async def fetch_data(url):
    # Simulate an I/O-bound operation
    await asyncio.sleep(1)
    return f'Data from {url}'

async def main():
    urls = ['url1', 'url2', 'url3']
    results = await asyncio.gather(*(fetch_data(url) for url in urls))
    print(results)

asyncio.run(main())

What if I need to handle exceptions in these coroutines?

You can use a try-except block within your coroutine to handle exceptions. Additionally, asyncio.gather() has an option to return exceptions if you set return_exceptions=True. Would you like to see an example?

Yes, please!