import asyncio
from contextlib import suppress


async def echo_forever():
    while True:
        print("echo")
        await asyncio.sleep(1)

@asyncio.coroutine
async def echo(reader, writer):
    print('client connected')

def main(loop):
    asyncio.ensure_future(echo_forever())  # fire and forget
    coro = asyncio.start_server(echo, '127.0.0.1', 8889, loop=loop)
    server = loop.run_until_complete(coro)


if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    main(loop)
    # Let's also cancel all running tasks: