Python：协程从未被期待

Question

我使用 await 然后在连接时发送一条 websocket 消息，但它一直给我“从未等待过”并且不发送，我尝试将 await 添加到 .send() 函数中，就像这个答案下面要求我这样做，但它会引发 TypeError: data is a dict-like object。

import asyncio
import websockets

logging.basicConfig()
IPAddress = input("Configure IP Address")
Port = input("Configure Port")
P1_UserID = ""
P2_UserID = ""
USERS = set()

async def register_player(websocket):
    global P1_UserID, P2_UserID
    if not P1_UserID:
        P1_UserID = websocket
        P1_UserID.send({"Player": 1})
    elif not P2_UserID:
        P2_UserID = websocket
        P2_UserID.send({"Player": 2})
    print(P1_UserID)
    print(P2_UserID)


async def server(websocket, path):
    await register(websocket)
    try:
        await register_player(websocket)
        async for e in websocket:
            print(e)
    finally:
        pass


start_server = websockets.serve(server, IPAddress, Port)

asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

Answer 1

查看websockets 模块documentation，看来您必须在websocket.send() 上使用await。

但是，在您的 register_player() 函数中，您分配 P1_UserID = websocket，您不会在下一行中的 send() 上分配 await。

除此之外，传递给websocket.send() 的message 不能是dict，参见here。

尝试将register_player() 更改为以下内容：

async def register_player(websocket):
    global P1_UserID, P2_UserID

    if not P1_UserID:
        P1_UserID = websocket
        await P1_UserID.send(json.dumps({"Player": 1}))
#       ^^^^^                ^^^^^^^^^^
#       This is missing      The message cannot be a
#       in your code.        dict, hence convert it to str.
    elif not P2_UserID:
        P2_UserID = websocket
        await P2_UserID.send(json.dumps({"Player": 2}))
#       ^^^^^                ^^^^^^^^^^
#       Same as above.       Same as above.