slow_operation.py

import asyncio

@asyncio.coroutine
def slow_operation(n):
    yield from asyncio.sleep(1)
    print("Slow operation {} complete".format(n))


@asyncio.coroutine
def main():
    yield from asyncio.wait([
        slow_operation(1),
        slow_operation(2),
        slow_operation(3),
    ])


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