aio_abort_behavior.py

import asyncio


class Protocol(object):
    def connection_made(self, transport):
        print("connection_made: {}".format(transport))
        transport.abort()

    def connection_lost(self, why):
        print("connection_lost: {}".format(why))                                                                                                

def make_proto():
    print("creating protocol")
    return Protocol()


async def main(loop):
    f = loop.create_connection(make_proto, host="localhost", port="8080")

    try:
        transport, proto = await f                                                                                                              
        print("transport: {}".format(transport))                                                                                                
        print("proto: {}".format(proto))
    except Exception as e:                                                                                                                      
        print("error: {}".format(e))


if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main(loop))

Output when there's a thing listening on 8080:

creating protocol
connection_made: <_SelectorSocketTransport fd=7 read=idle write=<idle, bufsize=0>>
connection_lost: None
transport: <_SelectorSocketTransport closed fd=7>
proto: <__main__.Protocol object at 0x7fae386874a8>