#!/usr/bin/env python3

import asyncio

@asyncio.coroutine
def sleeper(name, number):
    print("Task", name)
    yield from asyncio.sleep(number)
    return number

tasks = [
    asyncio.Task(sleeper("A", 2)),
    asyncio.Task(sleeper("B", 3)),
    asyncio.Task(sleeper("C", 4)),
    asyncio.Task(sleeper("D", 5)),
    asyncio.Task(sleeper("E", 6)) ]

@asyncio.coroutine
def watcher(tasks):
	for t in asyncio.as_completed(tasks):
		r = yield from t

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.Task(watcher(tasks)))

loop.close()