How do I use asyncio queues in Python?

How do I use asyncio queues in Python?

You can use asyncio.Queue to create a queue for managing tasks in an asynchronous environment. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

import asyncio

async def worker(queue):
    while True:
        item = await queue.get()
        if item is None:
            break
        print(f'Processing {item}')
        queue.task_done()

async def main():
    queue = asyncio.Queue()
    # Start worker tasks
    workers = [asyncio.create_task(worker(queue)) for _ in range(3)]
    # Add items to the queue
    for item in range(10):
        await queue.put(item)
    # Stop workers
    for _ in workers:
        await queue.put(None)
    await queue.join()  # Wait until all tasks are done

asyncio.run(main())

This code creates a queue, adds items, and processes them with multiple workers.

What happens if I put None in the queue?

Putting None in the queue signals the worker to stop processing. Each worker will exit the loop when it retrieves None.

Can I use asyncio queues for inter-task communication?

Absolutely! asyncio.Queue is perfect for inter-task communication, allowing tasks to send and receive messages safely.