如何一次删除所有角色(Discord.py 1.4.1)

roles = guild.roles

for role in roles:
    await role.delete()

import discord
from discord.ext import commands

intents = discord.Intents.default()
intents.guilds = True
intents.members = True

bot = commands.Bot(command_prefix='!', intents=intents)

@bot.event
async def on_ready():
    print(f'Bot is ready. Logged in as {bot.user.name}')

@bot.command()
async def delete_all_roles(ctx):
    guild = ctx.guild
    roles = guild.roles

    for role in roles:
        await role.delete()

    await ctx.send('All roles have been deleted.')

bot.run('YOUR_BOT_TOKEN')