aio_concurrent

import asyncio
import random
import time


async def do_stuff(i):
    ran = random.uniform(1, 5)
    await asyncio.sleep(ran)  # NOTE if we hadn't called
    # asyncio.set_event_loop() earlier, we would have to pass an event
    # loop to this function explicitly.
    print(i, time.time(), ran)
    return ran


async def main():
    now = time.time()
    futures = [do_stuff(i) for i in range(10000)]
    await asyncio.gather(
        *futures
    )
    print(time.time() - now)

if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())