如何让Telegram Bot指定发送消息到群组的message_thread_id（话题）

要让Bot把消息发送到群组内指定的话题，只需在调用send_message方法时额外传入message_thread_id参数即可，分两种场景处理：

场景1：固定发送到某个指定话题 #

如果想让Bot的所有指令回复都固定到某个特定话题，直接把该话题的ID填入参数：

async def add_point(update: Update, context: ContextTypes.DEFAULT_TYPE):
    user = update.effective_user
    chat = update.effective_chat
    # 替换成你目标话题的ID
    TARGET_THREAD_ID = 123456  
    is_admin = user.id in [admin.user.id for admin in await context.bot.get_chat_administrators(chat.id)]
    if not is_admin:
        await context.bot.send_message(
            chat_id=chat.id, 
            text="Only admins use this command.",
            message_thread_id=TARGET_THREAD_ID  # 添加话题ID参数
        )
        return
    
    # check if the message is a reply to another message
    if not update.message.reply_to_message:
        await context.bot.send_message(
            chat_id=update.effective_chat.id, 
            text="Please reply to a player to award a point.",
            message_thread_id=TARGET_THREAD_ID  # 添加话题ID参数
        )
        return

场景2：回复到用户发送指令所在的话题 #

如果希望Bot自动回复到用户发送指令的那个话题，直接从update.effective_message中获取当前的话题ID：

async def add_point(update: Update, context: ContextTypes.DEFAULT_TYPE):
    user = update.effective_user
    chat = update.effective_chat
    # 获取用户发送指令所在的话题ID
    current_thread_id = update.effective_message.message_thread_id
    is_admin = user.id in [admin.user.id for admin in await context.bot.get_chat_administrators(chat.id)]
    if not is_admin:
        await context.bot.send_message(
            chat_id=chat.id, 
            text="Only admins use this command.",
            message_thread_id=current_thread_id  # 使用当前话题ID
        )
        return
    
    # check if the message is a reply to another message
    if not update.message.reply_to_message:
        await context.bot.send_message(
            chat_id=update.effective_chat.id, 
            text="Please reply to a player to award a point.",
            message_thread_id=current_thread_id  # 使用当前话题ID
        )
        return

注意：只有当群组开启了话题功能（forum）时，message_thread_id才会生效，否则该参数会被忽略。

内容的提问来源于stack exchange，提问作者David Henson