问题描述

在我的 Python - Discord Bot 中，我想创建一个命令，它会导致循环运行.当我输入第二个命令时，循环应该停止.这么粗略的说:

In my Python - Discord Bot, I wanted to create a command, which causes a loop to run. The loop should stop when I enter a second command. So roughly said:

@client.event
async def on_message(message):
    if message.content.startswith("!C1"):
        while True:
            if message.content.startswith("!C2"):
                break
            else:
                await client.send_message(client.get_channel(ID), "Loopstuff")
                await asyncio.sleep(10)

所以它每 10 秒在频道中发布一次Loopstuff"，并在我输入 !C2 时停止

So it posts every 10 seconds "Loopstuff" in a Channel and stops, when I enter !C2

但我自己无法弄清楚.-.

But I cant figure it out on my own .-.

推荐答案

在你的 on_message 函数中 message 内容不会改变.因此，另一条消息将导致 on_message 再次被调用一次.您需要一种同步方法，即.!C2 消息到达时将改变的全局变量或类成员变量.

Inside your on_message function message content won't change. So another message will cause on_message to be called one more time. You need a synchronisation method ie. global variable or class member variable which will be changed when !C2 message arrives.

keepLooping = False

@client.event
async def on_message(message):
    global keepLooping
    if message.content.startswith("!C1"):
        keepLooping = True
        while keepLooping:
            await client.send_message(client.get_channel(ID), "Loopstuff")
            await asyncio.sleep(10)
    elif message.content.startswith("!C2"):
        keepLooping = False

附带说明，最好提供一个独立的示例，而不仅仅是一个函数.

As a side note it's good to provide a standalone example not just a single function.

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