to reproduce:
$ python3.5 -c 'import asyncio;
reader,writer=asyncio.get_event_loop().run_until_complete(asyncio.open_connection("debian.org",
"https", ssl=True));writer.transport._ssl_protocol._transport._sock.close() note that it worked fine in python3.4 (not the command above, py2dsp or most probably aiohttp that was used by py2dsp)

