geas-bot/app/cogs/botcommands/prefix.py

import yaml								# YAML parser for Bot config files
import asyncio							# Discord Py Dependency
import discord							# Main Lib
from discord.ext import commands		# Commands module
from bot import configFile, yaml_load, yaml_dump

### Cog for handling the non-Slash prefix for native Bot commands.

class Prefix(commands.Cog):
	def __init__(self, client):
		self.client = client
	
	@commands.command(
		name = 'changeprefix',
		aliases = ['prefix'],
		description = 'This command changes the prefix string for the native, non-slash command functionality of the bot. Defaults to `-`. It does not affect the workings of /commands.',
		brief = 'Changes the bot prefix.'		
	)
	async def _changePrefix(self, ctx, prefix:str = '-'):
		conf = yaml_load(configFile)
		conf[str(ctx.guild.id)]['prefix'] = prefix.lower()
		yaml_dump(conf, configFile)
		await ctx.send(f"`{self.client.user.name}`'s prefix for native bot commands has been changed to `{prefix}` for the guild `{ctx.guild.name}`.\n`Note: This will not affect /commands.`")
	
def setup(client):
	client.add_cog(Prefix(client))