Discord.py - 使用命令更改前缀

问题描述

我想创建一个命令，管理员可以在其中更改命令的前缀(例如:而不是使用."他们可以将其更改为-"，并且只有-"才会起作用)我会能够设置权限以使只有管理员能够使用该命令

I want to make a command where an admin can change the prefix for commands (eg: instead of using "." they can change it to "-" and only "-" will work if they do) I'd be able to setup the permissions to make only admins able to use the command

我环顾四周，通过 docs &互联网，但没有找到任何东西，我不知道如何做到这一点

I've looked around, through the docs & interwebs but haven't found anything and I haven't had any idea on how to do this

推荐答案

您应该使用 command_prefix 参数/api.html#bot" rel="noreferrer">discord.Bot 这接受字符串 (表示一个机器人范围的前缀) 或可调用的 (表示根据条件返回前缀的函数).

You should use the command_prefix argument for discord.Bot this accepts either a string (meaning one bot wide prefix) or a callable (meaning a function that returns a prefix based on a condition).

您的条件依赖于调用 message.因此，您可以允许公会定义自己的前缀.我将使用一个 dict 作为一个简单的例子:

Your condition relies on the invoking message. Therefore you can allow guilds to define their own prefixes. I'll use a dict as a simple example:

...

custom_prefixes = {}
#You'd need to have some sort of persistance here,
#possibly using the json module to save and load
#or a database
default_prefixes = ['.']

async def determine_prefix(bot, message):
    guild = message.guild
    #Only allow custom prefixs in guild
    if guild:
        return custom_prefixes.get(guild.id, default_prefixes)
    else:
        return default_prefixes

bot = commands.Bot(command_prefix = determine_prefix, ...)
bot.run()

@commands.command()
@commands.guild_only()
async def setprefix(self, ctx, *, prefixes=""):
    #You'd obviously need to do some error checking here
    #All I'm doing here is if prefixes is not passed then
    #set it to default 
    custom_prefixes[ctx.guild.id] = prefixes.split() or default_prefixes
    await ctx.send("Prefixes set!")

关于这个使用的一个很好的例子，请参考 Rapptz (discord.py 的创建者) 自己的 RoboDanny 机器人，他将其作为教育目的的公共回购例子.具体见prefix_callable函数，这是我的 determine_prefix 示例的更强大的版本.

For a great example of this in use, refer to Rapptz (the creator of discord.py)'s very own RoboDanny bot, he made it a public repo for educational purposes as an example. In specific, see prefix_callable function, it's a more robust version of my determine_prefix example.

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