how to add a coroutine to a running asyncio loop?

Question

How can one add a new coroutine to a running asyncio loop? Ie. one that is already executing a set of coroutines.

I guess as a workaround one could wait for existing

Answer 1

None of the answers here seem to exactly answer the question. It is possible to add tasks to a running event loop by having a "parent" task do it for you. I'm not sure what the most pythonic way to make sure that parent doesn't end until it's children have all finished (assuming that's the behavior you want), but this does work.

import asyncio
import random


async def add_event(n):
    print('starting ' + str(n))
    await asyncio.sleep(n)
    print('ending ' + str(n))
    return n


async def main(loop):

    added_tasks = []

    delays = [x for x in range(5)]

    # shuffle to simulate unknown run times
    random.shuffle(delays)

    for n in delays:
        print('adding ' + str(n))
        task = loop.create_task(add_event(n))
        added_tasks.append(task)
        await asyncio.sleep(0)

    print('done adding tasks')

    results = await asyncio.gather(*added_tasks)
    print('done running tasks')

    return results


loop = asyncio.get_event_loop()
results = loop.run_until_complete(main(loop))
print(results)