需要多个 wait_for_messages discord.py答案

【问题标题】：multiple wait_for_messages wanted discord.py需要多个 wait_for_messages discord.py
【发布时间】：2018-12-11 14:30:04
【问题描述】：

基本上我正在做一个测验，我希望能够搜索答案并确定哪条消息只包含艺术家，哪条消息只包含歌曲名称，以及哪条消息同时显示它们。我已经制作了 3 个检查函数来显示这一点，但是我希望所有 3 个 wait_for_message 语句并排运行。关于如何解决这个问题的任何想法？

await client.say("What is the song name and artist?")
def check1(msg):
    return name in msg.content.upper() and artist not in msg.content.upper()
def check2(msg):
    return artist in msg.content.upper() and name not in msg.content.upper()
def check3(msg):
    return name in msg.content.upper() and artist in msg.content.upper()
msg1 = await client.wait_for_message(timeout=10, check=check1)
msg2 = await client.wait_for_message(timeout=10, check=check2)
msg3 = await client.wait_for_message(timeout=20, check=check3)
if msg3 is not None:
   await client.say("@{} got both of them right! It was indeed {} by {}".format(msg3.author, toString(name), 
                                                                                     toString(artist)))
elif msg1 is not None and msg2 is not None:
        await client.say("@{} got the song name and @{} got the artist name! It was indeed {} by {}".format(msg1.author, 
                                                                           msg2.author, toString(name), toString(artist)))
elif msg1 is not None and msg2 is None:
        await client.say("@{} got the song name but no one got the artist! It was {} by {}".format(msg1.author,
                                                                                       toString(name), toString(artist)))
elif msg1 is None and msg2 is not None:
        await client.say("@{} got the artist name but no one got the song name! It was {} by {}".format(msg2.author,
                                                                                       toString(name), toString(artist)))
elif msg1 is None and msg2 is None and msg3 is None:
        await client.say("No one got it! It was {} by {}! Better luck next time".format(toString(name), toString(artist)))

【问题讨论】：

看看异步模块
相反，检查符合任何这些条件的邮件，然后将其分类到 wait_for_message 之外
@PatrickHaugh 我认为他正在等待这三个人，这样如果人们只猜名字，其他人仍然可以尝试猜出艺术家或两者兼而有之。

标签： python discord discord.py

【解决方案1】：

您要查找的代码是asyncio.gather。这让您可以同时运行多个协程并等待所有方法返回。

gather 的返回列表按照输入的顺序排列，而不是按照任务完成的顺序排列。

ret = await asyncio.gather(
    client.wait_for_message(timeout=10, check=check1),
    client.wait_for_message(timeout=10, check=check2),
    client.wait_for_message(timeout=10, check=check3)
)

msg1, msg2, msg3 = *ret
# msg1 has the name
# msg2 has the artist
# msg3 has both

由于 discord.py 的重写版本有 client.wait_for 抛出错误而不是返回 None，你可以改为这样做。

ret = await asyncio.gather(
    client.wait_for("message", timeout=10, check=check1),
    client.wait_for("message", timeout=10, check=check2),
    client.wait_for("message", timeout=10, check=check3),
    return_exceptions = True
)

# Test for errors
ret = [r if not isinstance(r, Exception) else None for r in ret]
msg1, msg2, msg3 = *ret

【讨论】：