importosimportasyncioimportgcimportsignalHOST="google.fr"# will keep the connection alive for a few minutes at leastasyncdefquery():reader,writer=awaitasyncio.open_connection(HOST,443,ssl=True)# No connection: close, remote side will keep the connection openwriter.write(f"GET / HTTP/1.1\r\nHost:{HOST}\r\n\r\n".encode())awaitwriter.drain()# only read the first header linetry:return (awaitreader.readline()).decode()finally:# closing the writer will properly finalize the connection# writer.close()pass# reader and writer are now unreachableasyncdefamain():awaitquery()# The _SSLProtocolTransport object is kept in memory and the# connection won't be released until the remote side closes the connectionfor_inrange(200):# Just be sure everything is freed, just in casegc.collect()awaitasyncio.sleep(1)defmain():print(f"PID{os.getpid()}")task=asyncio.ensure_future(amain())loop=asyncio.get_event_loop()loop.add_signal_handler(signal.SIGTERM,task.cancel)loop.add_signal_handler(signal.SIGINT,task.cancel)loop.run_until_complete(task)if__name__=="__main__":main()