def tornado_pair(io_loop):
server, client = socket.socketpair()
server_stream = tornado.iostream.IOStream(server)
client_stream = tornado.iostream.IOStream(client)
server_conn = StreamConnection(server_stream)
client_conn = StreamConnection(client_stream)
try:
yield server_conn, client_conn
finally:
server_stream.close()
client_stream.close()
