python - Discord.py discord.NotFound 异常

Question

大家。我一直在为我的 discord 服务器开发几个机器人，我在其中一个机器人中遇到了一个我似乎无法解决的问题。我有一个名为“信息”的命令，本质上，该命令显示有关所需用户的一些信息。当我调用命令 ?info [user] 时，它工作得很好，直到我有意请求一个不存在的用户的信息来测试我已经存在的异常。这里'

@laugh.command(pass_context=True)
async def info(ctx, user: discord.Member = None):
    if ctx.message.channel.name != "admin":
        await laugh.send_message(ctx.message.author, "Sorry, you need to be in a text channel called 'admin' for that.")
        return
    if not ctx.message.author.server_permissions.administrator:
        return
    if not user:
        user = ctx.message.author
    try:
        minfo = ("""
{0}'s ID is: {1}
{0}'s status is: {2}
{0}'s highest role is: {3}
{0} joined at: {4}""".format(user.name, user.id, user.status, user.top_role, user.joined_at))
        embed = discord.Embed(title = user.name, description = minfo, color = 0x00D2FF)
        await laugh.say(embed = embed)
    except discord.NotFound:
        await laugh.say("User not found.")

当我运行此代码并将一个不存在的用户作为参数时，我的异常不起作用，相反，我将此输出发送到我的控制台:

Ignoring exception in command info
Traceback (most recent call last):
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\bot.py", line 846, in process_commands
    yield from command.invoke(ctx)
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 367, in invoke
    yield from self.prepare(ctx)
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 345, in prepare
    yield from self._parse_arguments(ctx)
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 304, in _parse_arguments
    transformed = yield from self.transform(ctx, param)
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 223, in transform
    raise e
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 221, in transform
    return (yield from self.do_conversion(ctx, converter, argument))
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 184, in do_conversion
    return instance.convert()
  File "C:\Users\Matthew\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\converter.py", line 100, in convert
    raise BadArgument('Member "{}" not found'.format(self.argument))
discord.ext.commands.errors.BadArgument: Member "test" not found

我查看了无数示例和论坛帖子，我获得的唯一知识是错误的来源在 async def info(ctx, user: discord.Member = None):，关于我可以做什么的任何想法？

Answer 1

命令的错误处理有点奇怪。当您为参数 user 指定转换器时，该转换发生在命令协程的主体之外。要处理它，您必须编写一个错误处理程序协程，并将其与相关命令相关联。

@laugh.command(pass_context=True)
async def info(ctx, user: discord.Member = None):
    if ctx.message.channel.name != "admin":
        await laugh.send_message(ctx.message.author, "Sorry, you need to be in a text channel called 'admin' for that.")
        return
    if not ctx.message.author.server_permissions.administrator:
        return
    if not user:
        user = ctx.message.author
    minfo = ("""
{0}'s ID is: {1}
{0}'s status is: {2}
{0}'s highest role is: {3}
{0} joined at: {4}""".format(user.name, user.id, user.status, user.top_role, user.joined_at))
    embed = discord.Embed(title = user.name, description = minfo, color = 0x00D2FF)
    await laugh.say(embed = embed)

@info.error
async def info_error(ctx, error): # This might need to be (error, ctx), I'm not sure
    if isinstance(error, commands.BadArgument):
        await laugh.say('I could not find that user')

您可以阅读错误处理程序的文档，以及 discord.ext.commands 模块的其余部分，在 documentation for the rewrite branch. 中

如果您要使用命令扩展进行大量工作，那么现在转换您的代码可能很有意义，这样您就可以使用准确的文档。