Question

我正在尝试Song-Objects到我的Queue-Object，以便从图书馆Playlist-Object获取Pafy的实际歌曲。

playlist = pafy.get_playlist("playlist url here")
counter = 0
for s in playlist["items"]:
    counter += 1
    s = s["pafy"]
    song = Song.Song(s.watchv_url, msg.author.name, s.title, s.description, s.author, s.published, s.duration,
                     s.likes, s.dislikes,
                     s.viewcount, s.thumb)
    if queue.add_song(song=song):
        print("Song " + str(counter) + " finished")
    else:
        print("Song " + str(counter) + " not added")

class Song:
    def __init__(self, url, requested_by, title, description, uploader, upload_date, duration, likes, dislikes, views, thumbnail):
        self.url = url
        self.requested_by = requested_by
        self.title = title
        self.description = description
        self.uploader = uploader
        self.upload_date = upload_date
        self.duration = duration
        self.likes = likes
        self.dislikes = dislikes
        self.views = views
        self.thumbnail = thumbnail

class PlayerQueue:
    list_of_songs = []
    length = 0
    current_song = []
    replaying = False
    random = False

    def add_song(self, song):
        try:
            self.length += 1
            self.list_of_songs.append(song)
            return True
        except Exception:
            return False

    def remove_song(self, song):
        if song in self.list_of_songs:
            self.length -= 1
            self.list_of_songs.remove(song)
            return True
        else:
            return False

    def replay(self):
        self.replaying = True

    def randomize(self):
        self.random = True

    def clear(self):
        self.list_of_songs = []
        self.length = 0
        self.replaying = False
        self.random = False

我是否也应该add_song-Method异步？

循环此代码大约需要1-2秒。这导致我遇到asyncio的问题，因为它会抛出TimeoutError。 30秒后发生此错误，对于70首歌曲，循环需要超过一分钟。这个循环是否很慢，因为它是在async def function中运行的？我能让它更快吗？

以下是错误：

    ERROR:asyncio:Task exception was never retrieved
    future: <Task finished coro=<VoiceClient.poll_voice_ws() done, defined 
    at C:\Users\user\AppData\Local\Programs\Python\Python35-32\lib\site-packages\discord\voice_client.py:269> exception=TimeoutError()>
    Traceback (most recent call last):
      File "C:\Users\user\AppData\Local\Programs\Python\Python35-32\lib\asyncio\tasks.py", line 239, in _step
        result = coro.send(None)
      File "C:\Users\user\AppData\Local\Programs\Python\Python35-32\lib\site-packages\discord\voice_client.py", line 276, in poll_voice_ws
        yield from self.ws.poll_event()
      File "C:\Users\user\AppData\Local\Programs\Python\Python35-32\lib\site-packages\discord\gateway.py", line 676, in poll_event
        msg = yield from asyncio.wait_for(self.recv(), timeout=30.0, loop=self.loop)
      File "C:\Users\user\AppData\Local\Programs\Python\Python35-32\lib\asyncio\tasks.py", line 396, in wait_for
        raise futures.TimeoutError()
    concurrent.futures._base.TimeoutError

我可以在现有的asyncio.event.loop中为我的for循环创建新任务，所以我不会遇到这个TimeoutError吗？我应该尝试抓住它然后继续吗？

Full code here

目前正在运行：

Intel I5系列CPU

64 GB DDR4 Ram

Python 3.x

Answer 1

我现在正在使用另一个库来下载播放列表。我正在使用thread library来解决它，所以在加入vc之前我在一个单独的线程中开始下载，所以我没有得到timeout error。

Python在异步函数中缓慢for循环

1 个答案: