Question

我目前正在编码一个不和谐的机器人，并且我有一个命令，该命令使用MyAnimeList API发送随机动漫的URL。这是我的代码：

@client.command()
async def anime(ctx):
    await ctx.send("Récupération d'un anime...")
    anime = 0
    while anime == 0:
        async with ctx.typing():
            try:
                ref = randrange(1, 40500)
                anime = Anime(ref)
                await ctx.send(anime)
            except ValueError as err:
                if str(err) == 'No such id on MyAnimeList':
                    pass
                else:
                    pass

我正在使用while循环重试api是否返回404错误（因为并非在myanimelist.net上使用了每个动漫ID）我得到的错误是：

Ignoring exception in command anime:
Traceback (most recent call last):
File "/home/container/.local/lib/python3.6/site-packages/discord/ext/commands/core.py", line 83, in wrapped
ret = await coro(*args, **kwargs)
File "bot.py", line 46, in anime
anime = Anime(ref)
File "/home/container/.local/lib/python3.6/site-packages/mal/anime.py", line 8, in __init__
super().__init__(mal_id, "anime", timeout)
File "/home/container/.local/lib/python3.6/site-packages/mal/mal.py", line 15, in __init__
title = self._page.find("meta", property="og:title")["content"]
TypeError: 'NoneType' object is not subscriptable
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/container/.local/lib/python3.6/site-packages/discord/ext/commands/bot.py", line 892, in invoke
await ctx.command.invoke(ctx)
File "/home/container/.local/lib/python3.6/site-packages/discord/ext/commands/core.py", line 797, in invoke
await injected(*ctx.args, **ctx.kwargs)
File "/home/container/.local/lib/python3.6/site-packages/discord/ext/commands/core.py", line 92, in wrapped
raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: TypeError: 'NoneType' object is not subscriptable

我认为问题出在randrange（）函数上。当我在寻找解决方案时，每个遇到相同问题的人都有一个涉及列表的代码，但是我的代码中没有任何代码... 我正在使用Python 3.7.6。问题可能来自mal-api库本身...

Answer 1

您可能会遇到限速或其他干扰正在返回的网页的问题。您可以尝试围绕Anime编写包装类，以查看_page属性，以了解问题所在：

class MyAnime(Anime):
    def __init__(self, ref):
        try:
            super().__init__(ref)
        except:
            print(self._page)
            print(self._page.find("meta"))
            print(self._page.find("meta", property="og:title"))

具有函数randrange（）的错误：“命令引发异常：TypeError：'NoneType'对象不可下标”

1 个答案: