Question

我想检查用户是否给出了两个参数，第一个是要禁止（提及）的用户和原因。

如果未提及用户，则会显示一条消息，提示您“您必须提及您要禁止的用户”；如果未提供原因，则会禁止用户显示“未提供原因” “。

我也想做到这一点，以便即使discord.py尚未实现，也不能禁止自己

我尝试使用if args == None:语句，但这不起作用。

@commands.has_permissions(ban_members=True)
@client.command()
async def ban(ctx, member: discord.Member, *, arg):
    embed = discord.Embed(title="Punishments", color=0x3b55e8)
    embed.add_field(name=f"{member} has been banned for:", value=arg)
    embed.set_footer(text=strftime("%Y-%m-%d %H:%M:%S", gmtime()))
    await ctx.send(embed=embed)
    await member.ban()
@ban.error
async def ban_error(ctx, error):
    if isinstance(error, commands.MissingPermissions):
        embed = discord.Embed(title="Error", color=0x3b55e8)
        embed.add_field(name="You do not have permission to use this command", value="If you think this is incorrect, please contact a server administrator")
        embed.set_footer(text=strftime("%Y-%m-%d %H:%M:%S", gmtime()))
        await ctx.send(embed=embed)
        print(f"{ctx.author} has attempted to ban a player, but does not have the correct permissions")

我没有收到任何错误。

Answer 1

您可以为自己的原因设置默认值，并在未传递必需参数时添加错误处理程序以处理失败：

@commands.has_permissions(ban_members=True)
@client.command()
async def ban(ctx, member: discord.Member, *, arg="No Reason Given"):
    embed = discord.Embed(title="Punishments", color=0x3b55e8)
    embed.add_field(name=f"{member} has been banned for:", value=arg)
    embed.set_footer(text=strftime("%Y-%m-%d %H:%M:%S", gmtime()))
    await ctx.send(embed=embed)
    await member.ban()

@ban.error
async def ban_error(ctx, error):
    if isinstance(error, commands.MissingPermissions):
        embed = discord.Embed(title="Error", color=0x3b55e8)
        embed.add_field(name="You do not have permission to use this command", value="If you think this is incorrect, please contact a server administrator")
        embed.set_footer(text=strftime("%Y-%m-%d %H:%M:%S", gmtime()))
        await ctx.send(embed=embed)
        print(f"{ctx.author} has attempted to ban a player, but does not have the correct permissions")
    elif isinstance(error, commands.MissingRequiredArgument):
        await ctx.send("You must mention a user you'd like to ban")
    else:
        raise error

Answer 2

Patrick Haugh已经回答了这个问题，但是最好创建一个error.py并在其中插入所有全局错误。 Link to the documentation (CommandErrors)

这看起来像这样：

import discord
from discord.ext import commands


class Error(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

    @commands.Cog.listener()
    async def on_command_error(self, ctx, error):
        if isinstance(error, commands.CheckFailure):
            await ctx.send(embed=discord.Embed(color=discord.Color.red(), description=f"You don't have the permission to execute this bot command!"))
        if isinstance(error, commands.CommandNotFound):
            await ctx.send(embed=discord.Embed(color=discord.Color.red(), description=f"The bot command doesn't exist!"))
        if isinstance(error, commands.MissingRequiredArgument):
            await ctx.send(embed=discord.Embed(color=discord.Color.red(), description=f"The command is incomplete, missing one or more parameters!"))
        if isinstance(error, commands.BadArgument):
            await ctx.send(embed=discord.Embed(color=discord.Color.red(), description=f"The command was entered incorrectly, one or more parameters are wrong or in the wrong place!"))


def setup(bot):
    bot.add_cog(Error(bot))

如何检查是否给出参数？

2 个答案: