Aiohttp TCP套接字错误

Question

我正在使用此代码尝试使用aiohttp来运行服务器套接字，但是每当我启动脚本Server Started时，都不会输出到命令行

async def socket_server(reader, writer):

    print("Server Started")
    data = await reader.read(100)
    message = data.decode()
    addr = writer.get_extra_info('peername')
    print("Received %r from %r" % (message, addr))

    print("Send: %r" % message)
    writer.write(data)
    await writer.drain()

    print("Close the client socket")
    writer.close()

loop = asyncio.get_event_loop()
coro = asyncio.start_server(socket_server, '127.0.0.1', 9000, loop=loop)
server = loop.run_until_complete(coro)
try:
    loop.run_forever()
except KeyboardInterrupt:
    pass
server.close()
loop.run_until_complete(server.wait_closed())
loop.close()