#!/usr/bin/env python3

import asyncio
import socket


async def connect():
    global loop, sock
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.setblocking(False)
    await loop.sock_connect(sock, ("sdf.org", 22))


def disconnect():
    global loop, sock
    sock.shutdown(socket.SHUT_RDWR)
    sock.close()
    sock = None


async def main():
    global loop, sock
    await connect()
    fut = loop.sock_recv(sock, 5)
    disconnect()
    await connect()
    await fut
    disconnect()


sock = None
loop = asyncio.get_event_loop()
loop.run_until_complete(main())
loop.close()