Per server prefixs

问题:

I was wondering how I would go about allowing every server my bot is connected to, to set their own prefix. I am using the async version of dpy with Commands ext. I would assume you would store the prefix's and server name in a .json file, but I don't know how you would write them or check the file for them.

Thanks

回答1:

You can do this with dynamic command prefixes. Write a function or coroutine that takes a Bot and a Message and outputs the appropriate prefix for that message. Assuming you had a JSON of server ids to prefixes:

{ 
  "1234": "!",
  "5678": "?"
}

You can load that json into a dictionary and then look up server ids in that dictionary. Below I also include a default prefix, but you could also raise a CommandError or something for servers with no specific prefix.

from discord import commands
import json

with open("prefixes.json") as f:
    prefixes = json.load(f)
default_prefix = "!"

def prefix(bot, message):
    id = message.server.id
    return prefixes.get(id, default_prefix)

bot = commands.Bot(command_prefix=prefix)

...