tiny echo server with asyncio

echo.py

import asyncio


@asyncio.coroutine
def server_callback(reader, writer):
    while True:
        data = yield from reader.readline()
        yield from asyncio.sleep(1)
        writer.write(data)
        yield from writer.drain()

coro = asyncio.start_server(server_callback, 'localhost', 7000)

loop = asyncio.get_event_loop()
server = loop.run_until_complete(coro)
loop.run_forever()