discord.py...but中的$guess命令我有一个问题

import discord
import random

client = discord.Client()

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

@client.event
async def on_message(message):
    if message.content.startswith('$guess'):
        # 生成一个1到100的随机数
        number = random.randint(1, 100)
        max_guesses = 5
        guesses = 0

        await message.channel.send('猜一个1到100之间的数字！')

        while guesses < max_guesses:
            try:
                guess = await client.wait_for('message', timeout=30.0)
                guess = int(guess.content)

                if guess == number:
                    await message.channel.send('恭喜你，猜对了！')
                    break
                elif guess < number:
                    await message.channel.send('猜的数字太小了！')
                else:
                    await message.channel.send('猜的数字太大了！')

                guesses += 1
            except ValueError:
                await message.channel.send('请输入一个有效的数字！')

        if guesses == max_guesses:
            await message.channel.send(f'很遗憾，你没有猜对。正确答案是{number}。')

client.run('YOUR_BOT_TOKEN')