nextcord 包的错误处理程序问题答案

【问题标题】：issues on error handler with nextcord packagenextcord 包的错误处理程序问题
【发布时间】：2021-11-05 15:49:36
【问题描述】：

我这里有这段代码，它应该使用 nextcord.py 包处理不和谐机器人的命令错误。问题是，每次我进入这些错误时，它只会在输出中给我 MissingRequiredArgument 错误和 else 语句我检查了调试，变量错误没有任何问题，它采用错误的类的方法，但问题是当它传入 if 语句时，它只是忽略了 isinstance()

@load.error
async def load_error(ctx : commands.Context, error : commands.CommandError):
    """
    "Handle load errors
    :param ctx: context
    :param error: Errors(ExtensionNotFound, ExtensionAlreadyLoaded, NoEntryPoint, ExtensionFailed)
    :return: None
    """
    if isinstance(error, commands.ExtensionNotFound):
        message = "Message"
    elif isinstance(error, commands.MissingRequiredArgument):
        message = "message"
    elif isinstance(error, commands.ExtensionAlreadyLoaded):
        message = "Message"
    elif isinstance(error, commands.NoEntryPointError):
        message = "Message"
    elif isinstance(error, commands.ExtensionFailed):
        message = "message"
    else:
        message = "message"
    await ctx.send(message, delete_after=5)
    await ctx.message.delete(delay=5)

【问题讨论】：

尝试在 nextcord discord 服务器中询问

标签： python error-handling discord.py chatbot

【解决方案1】：

好的，我解决了，这是新代码

@load.error
async def load_error(ctx : commands.Context, error : commands.CommandError):
    """
    "Handle load errors
    :param ctx: context
    :param error: Errors(ExtensionNotFound, ExtensionAlreadyLoaded, NoEntryPoint, ExtensionFailed)
    :return: None
    """
    if isinstance(error.__cause__, commands.ExtensionNotFound):
        message = f"L'estensione {error.__cause__.name.strip('cogs.')} non può essere importata, hai inserito il nome giusto?"
    elif isinstance(error, commands.MissingRequiredArgument):
        message = "Devi inserire il nome del file da importare"
    elif isinstance(error.__cause__, commands.ExtensionAlreadyLoaded):
        message = f"L'estensione {error.__cause__.name.strip('cogs.')} è già stata caricata, non c'è bisogno di ricaricarla"
    elif isinstance(error.__cause__, commands.NoEntryPointError):
        message = f"Non ho trovato nessun setup nell'estensione {error.__cause__.name.strip('cogs.')}"
    elif isinstance(error.__cause__, commands.ExtensionFailed):
        message = f"C'è stato un errore nell'importare l'estenzione {error.__cause__.name.strip('cogs.')}"
    else:
        message = f"{error} C'è stato un errore durante l'esecuzione del comando"
    await ctx.send(message, delete_after=5)
    await ctx.message.delete(delay=5)

基本上我必须指定错误对象的 cause 方法来获取错误的实例此外，这似乎对 MissingRequiredArgument 错误没有必要

【讨论】：