Function do_echo

src/tests/test_python_socket.py:940–946

(host, port, msg)

        import asyncio

        async def do_echo(host, port, msg):
            reader, writer = await asyncio.open_connection(host, port)
            writer.write(msg)
            await writer.drain()
            data = await reader.read(1024)
            writer.close()
            return data.decode()

        r1, r2 = await asyncio.gather(
            do_echo(host1, port1, b"conn1"),