无法在聊天中显示错误

Question

我试图让我的机器人通过吐出You do not have the permissions {} 来告诉用户是否有错误但是当我尝试使用此代码时：

@client.command(pass_context = True)
async def ban(ctx, member : discord.Member, *, content: str):
    if ctx.message.author == client.user:
        return
    if ctx.message.author.server_permissions.administrator:
        msg = (str(member) + "has been banned for" + str(content)).format(ctx.message)
        await client.send_message(member, content)
        await client.ban(member)
        await client.send_message(ctx.message.channel, msg)
@ban.error
async def ban_error(error, ctx):
    if isinstance(error, CheckFailure):
        msg = "Sorry but you do not have the permissions {}".format(ctx.message.author.mention)  
        await client.send_message(ctx.message.channel, msg)

discord bot dms 用户，python 控制台中没有错误，如果我删除 @ban.error 部分，我会得到一个权限错误太低。

Answer 1

CheckFailure 只有在 check 失败时才会被提升。您的代码中没有检查，所以这永远不会发生。您可以使用 commands.has_permission 轻松地将您的 if 语句转换为支票：

@client.command(pass_context = True)
@has_permissions(administrator=True)
async def ban(ctx, member : discord.Member, *, content: str):
    msg = "{} has been banned for {}".format(ctx.message.author.mention, content)
    await client.send_message(member, content)
    await client.ban(member)
    await client.send_message(ctx.message.channel, msg)

错误处理程序可能会隐藏有价值的错误信息。对于不是CheckFailures 的任何其他错误，我们可以调用内置错误处理的机器人

from discord.ext.commands import CheckFailure
from discord import Forbidden


@ban.error
async def ban_error(error, ctx):
    if isinstance(error, CheckFailure):
        msg = "Sorry but you do not have the permissions {}".format(ctx.message.author.mention)  
        await client.send_message(ctx.message.channel, msg)
    elif isinstance(error, Forbidden):
        await client.send_message(ctx.message.channel, "I do not have the correct permissions")
    else:
        print(error)
        await client.on_command_error(error, ctx)