discord.py中wait_for的check函数验证失效问题求助

我正在开发一款Discord机器人，核心功能是向用户发送句子拆解题目并验证答案正确性。但目前遇到问题：明明用户输入的答案和预设答案完全一致，check函数却返回False，导致机器人无法识别正确答案，也不会对正确回答做出反馈。

我的代码： #

@commands.Cog.listener()
async def on_message(self, message):
    if message.channel.id == 1051856493764415568:
        if message.author.bot:
            return
        else:
            rand_num = randint(4,6)
            if rand_num == 5:
                ss = open('scrambled sentences.txt','r')
                sslist = ss.readlines()
                chosen_sentence = choice(sslist)
                cs_list = chosen_sentence.split("|")
                question_msg = await message.reply(f"Unscramble the following sentence in 10 seconds for a chance to win a firework:\n\n{cs_list[0]}")

                def check(m: discord.Message):
                    print(m.content)
                    print(cs_list[-1])
                    # 打印后显示内容一致，但判断不通过
                    return m.channel.id == m.channel.id and m.content.lower == cs_list[-1]

                try:
                    msg = await self.bot.wait_for('message', check = check, timeout = 10.0)
                except asyncio.TimeoutError: 
                    await question_msg.reply(f"Noone sent the correct answer in the 10 seconds provided...")
                    return
                else:
                    await msg.channel.send(f"**{msg.author}**, you responded with {msg.content}!")
                    return
                    # await message.channel.send(f"{msg.author.mention} was first! He gets one firework. The answer was:\n\n{cs_list[-1]}")

scrambled sentences.txt文件内容： #

Question) `RsgaD si het btse reve!`|drags is the best ever!
Question) `RsgaD si het torws reve!`|drags is the worst ever!

问题修复方案 #

1. 修正字符串比较的语法错误

m.content.lower是方法引用而非调用结果，必须加括号m.content.lower()才能获取小写后的字符串，否则是在比较方法对象和字符串，永远不相等。

2. 处理文件读取的换行符问题

readlines()会保留每行末尾的\n换行符，导致cs_list[-1]末尾多了一个换行符，和用户输入的内容不匹配。可以通过strip()去掉首尾空白字符：

chosen_sentence = choice(sslist).strip()

3. 修正通道判断逻辑

原代码中m.channel.id == m.channel.id永远为True，应该改为判断消息来自题目所在的目标通道：

return m.channel.id == message.channel.id and m.content.lower() == cs_list[-1].lower()

（额外建议：把预设答案也转成小写，避免大小写敏感的问题）

修复后的完整代码片段 #

@commands.Cog.listener()
async def on_message(self, message):
    target_channel_id = 1051856493764415568
    if message.channel.id == target_channel_id:
        if message.author.bot:
            return
        rand_num = randint(4,6)
        if rand_num == 5:
            # 用with语句自动关闭文件，避免资源泄漏
            with open('scrambled sentences.txt','r') as ss:  
                sslist = ss.readlines()
            chosen_sentence = choice(sslist).strip()  # 去掉换行符和首尾空白
            cs_list = chosen_sentence.split("|")
            question_msg = await message.reply(f"Unscramble the following sentence in 10 seconds for a chance to win a firework:\n\n{cs_list[0]}")

            def check(m: discord.Message):
                # 校验通道+大小写不敏感的答案匹配
                return m.channel.id == target_channel_id and m.content.lower() == cs_list[-1].lower()

            try:
                msg = await self.bot.wait_for('message', check=check, timeout=10.0)
            except asyncio.TimeoutError: 
                await question_msg.reply(f"Noone sent the correct answer in the 10 seconds provided...")
                return
            else:
                await msg.channel.send(f"**{msg.author}**, you got it right! The answer was: {cs_list[-1]}")
                # 此处可添加发放奖励的逻辑
                return

内容的提问来源于stack exchange，提问作者DRags