MessageHandler无法捕获命令

我们希望监控向机器人发送命令的用户, 但是当机器人启动时, messagehandler能够捕获消息并报告私人聊天已启动,但它似乎无法捕获三个预定义命令中的任何一个(这些命令运行良好)。

这令人困惑。

下面是主要功能块。

提前谢谢。

def main() -> None:
    """Start the bot."""
    # Create the Application and pass it your bot's token.
    application = Application.builder().token("token").build()

    # Command handlers
    application.add_handler(CommandHandler('help', help_command))
    application.add_handler(CommandHandler('start', start))
    application.add_handler(CommandHandler('show_chats', show_chats))

    # Handle members joining/leaving chats.
    application.add_handler(ChatMemberHandler(greet_chat_members, ChatMemberHandler.CHAT_MEMBER))

    # Keep track of which chats the bot is in
    application.add_handler(ChatMemberHandler(track_chats, ChatMemberHandler.MY_CHAT_MEMBER))

    # Interpret any other command or text message as a start of a private chat.
    # This will record the user as being in a private chat with bot.
    application.add_handler(MessageHandler(filters.ALL, start_private_chat))

    # Run the bot until the user presses Ctrl-C
    # We pass 'allowed_updates' handle *all* updates including `chat_member` updates
    # To reset this, simply pass `allowed_updates=[]`
    application.run_polling(allowed_updates=Update.ALL_TYPES)

如果我把命令处理程序放在消息处理程序后面,它们就不再工作了。