import asyncio
import random

async def handle_echo(reader, writer):
    while True:
        data = await reader.readline()
        message = data.decode()
        addr = writer.get_extra_info('peername')
        print(f"Received {message!r} from {addr!r}")
        message = f'pong{random.randint(0,10)}\n'
        response = message.encode()

        writer.write(response)
        await writer.drain()
        if reader.at_eof():
            break

    print("Close the connection")
    writer.close()

async def main():
    server = await asyncio.start_server(
        handle_echo, '127.0.0.1', 8888)

    addr = server.sockets[0].getsockname()
    print(f'Serving on {addr}')

    async with server:
        await server.serve_forever()

asyncio.run(main())