如何在discord.py重写时获取用户角色

import discord
from discord.ext import commands

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

@bot.event
async def on_ready():
    print('Bot is ready!')

@bot.command()
async def get_roles(ctx):
    member = ctx.author  # 获取命令发送者的成员对象
    roles = member.roles  # 获取成员的角色列表
    role_names = [role.name for role in roles]  # 获取角色名称列表
    await ctx.send(f'{member.name}的角色有：{", ".join(role_names)}')

bot.run('YOUR_BOT_TOKEN')