Discord.py报错AttributeError：'Command'对象无'CommandOnCooldown'属性

你碰到的这个错误，根源是代码里把CommandOnCooldown异常类当成了命令对象的属性来用，但实际上这个异常类是discord.ext.commands模块下的东西。

修复方法 #

检查你的错误处理函数，确保判断冷却异常时用的是commands.CommandOnCooldown，而不是命令对象（比如daily.CommandOnCooldown）。正确的写法如下：

@daily.error
async def daily_error(ctx, error):
    if isinstance(error, commands.CommandOnCooldown):
        remaining_time = error.retry_after
        await ctx.send(f"You need to wait {remaining_time:.0f} seconds before claiming your daily bonus again.")

额外检查点 #

• 确认已经正确导入commands模块：from discord.ext import commands
• 若使用的Discord.py版本过旧，建议升级到v1.x或v2.x版本，该异常类在这两个版本中都稳定存在于commands模块下。

（可选）优化文件操作逻辑 #

你的daily命令里为每个用户单独创建文件，没必要循环读取每行，直接读写文件内容即可，简化后的代码示例：

try:
    with open(f'{ctx.author.id}.txt', 'r') as f:
        content = f.read().strip()
        balance = int(content.split(':')[1]) if content else 0
    # 计算新余额
    bonus = random.randint(1, 1000) * 15
    new_balance = balance + bonus
    # 写入新余额
    with open(f'{ctx.author.id}.txt', 'w') as f:
        f.write(f"{ctx.author.id}:{new_balance}")
    # 发送提示消息
    embed = discord.Embed(title=f"{ctx.author.name} claimed their daily bonus!", description=f"You earned `{bonus}`:dollar: as your daily bonus.\nYour new balance is `{new_balance}` :dollar:.\n\n*This command has a cooldown of 24 hours.*", color=0x000000)
    await ctx.send(f"{ctx.author.mention}", embed=embed)
except FileNotFoundError:
    embed = discord.Embed(title=f"{ctx.author.name}", description=f"You do not have a balance. Please use the `++reset` command to create one.\n\n*This command has a cooldown of 24 hours.*", color=0x000000)
    await ctx.send(f"{ctx.author.mention}", embed=embed)

内容的提问来源于stack exchange，提问作者Saka Discord