Question

我开始使用以下可用的基本代码（如http://aaugustin.github.io/websockets/中的示例代码）：

import asyncio
import websockets

@asyncio.coroutine
def servePlayer(websocket, path):
    yield from websocket.send("Hello World")

start_server = websockets.serve(servePlayer, 'localhost', 8765)
asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

我将此修改为类似但不再有效的东西。我不知道为什么。这是修改后的版本：

import asyncio
import websockets

class Player:
    def __init__(self, connection):
        self.connection = connection
    def send(self, data):
        print("sending")
        yield from self.connection.send(data)

@asyncio.coroutine
def servePlayer(websocket, path):
    player = Player(websocket)
    player.send("Hello World")

start_server = websockets.serve(servePlayer, 'localhost', 8765)
asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

代码甚至没有到达“发送”行。

Answer 1

您的player.send()方法也是一个生成器;你需要委托给那个发电机：

@asyncio.coroutine
def servePlayer(websocket, path):
    player = Player(websocket)
    yield from player.send("Hello World")

为什么这个使用yield的Python程序不起作用？

1 个答案: