Python discord.py-机器人不'；无法响应多个连接的消息

我正试图让一个不和谐的机器人用Python讲笑话。然而，特别是关于敲门笑话，我无法让机器人在用户回答“谁在那里”后做出响应。 你能帮我吗

@bot.command(pass_context=True)
async def joke(ctx, type):

    if type.lower() == "ym":
        yo_momma = ("fat, I took a picture of her last Christmas and it's still printing.",
               "fat when she got on the scale it said, 'I need your weight not your phone number.'",
               "fat and old when God said, 'Let there be light', he asked your mother to move out of the way.",
               "fat she doesn't need the internet, because she's already world wide.",
               "fat, when she sat on an iPod, she made the iPad!",
               "fat she walked past the TV and I missed 3 episodes.",
               "ugly when she tried to join an ugly contest they said, 'Sorry, no professionals.'",
               "ugly she made One Direction go another direction.",
               "ugly Fix-It Felix said, 'I can\'t fix it.'"
               "stupid when an intruder broke into her house, she ran downstairs, dialed 9-1-1 on the microwave, and couldn't find the 'CALL' button.",
               "stupid she stuck a battery up her ass and said, 'I GOT THE POWER!'",
               "stupid that she sat on the TV to watch the couch.")
        await bot.say("Yo momma so {}".format(random.choice(yo_momma)))

    elif type.lower() == "kk":
        await bot.send_message(ctx.message.channel, "Knock Knock.")

        if "who's there" in ctx.message.content.lower():
            kk = [["A little old lady", "All this time, I did not know you could yodel."],
              ["Cow says", "Cow says mooooo!"],
              ["Etch", "Bless you, friend."],
              ["Robin", "Now hand over the cash."],
              ["Cash", "No thanks, I'll have some peanuts."],
              ["Mustache", "I mustache you a question, but I'll shave it for later."],
              ["Tank", "You're welcome."],
              ["Candice", "Candice door open, or what?"],
              ["Boo", "No need to cry, it's only a joke."],
              ["Howl", "Howl you know unless you open this door?"],
              ["Iran", "Iran all the way here. Let me in already!"]]

        joke_num = random.randint(0, 9)
        chosen_joke = [kk[joke_num][0], kk[joke_num][1]]
        await bot.say(chosen_joke[0])

        if "{} who".format(chosen_joke[0]) in ctx.message.content.lower():
            await bot.say(chosen_joke[1])

您可以使用

check

功能等待具有特定内容的特定用户的消息：

elif type.lower() == "kk":
    await bot.send_message(ctx.message.channel, "Knock Knock.")

    check = lambda m: "who's there" in m.content.lower()
    await bot.wait_for_message(author=ctx.message.author, channel=ctx.message.channel, check=check)
    kk = [["A little old lady", "All this time, I did not know you could yodel."],
          ["Cow says", "Cow says mooooo!"],
          ["Etch", "Bless you, friend."],
          ["Robin", "Now hand over the cash."],
          ["Cash", "No thanks, I'll have some peanuts."],
          ["Mustache", "I mustache you a question, but I'll shave it for later."],
          ["Tank", "You're welcome."],
          ["Candice", "Candice door open, or what?"],
          ["Boo", "No need to cry, it's only a joke."],
          ["Howl", "Howl you know unless you open this door?"],
          ["Iran", "Iran all the way here. Let me in already!"]]

    joke_num = random.randint(0, 9)
    chosen_joke = [kk[joke_num][0], kk[joke_num][1]]
    await bot.say(chosen_joke[0])


    check = lambda m: "{} who".format(chosen_joke[0]) in m.content.lower()
    await bot.wait_for_message(author=ctx.message.author, channel=ctx.message.channel, check=check)
    await bot.say(chosen_joke[1])