如何在我的curses程序中实现类似vim的“命令行”

import curses

def main(stdscr):
    # 初始化curses
    curses.curs_set(0)
    stdscr.nodelay(1)
    stdscr.timeout(100)

    # 创建命令行窗口
    cmd_win = curses.newwin(1, curses.COLS, curses.LINES-1, 0)
    cmd_win.addstr(0, 0, ":", curses.A_BOLD)
    cmd_win.refresh()

    # 创建文本框
    input_win = curses.newwin(1, curses.COLS-1, curses.LINES-1, 1)
    input_win.keypad(1)
    input_win.timeout(-1)

    # 接收用户输入的命令
    command = ""
    while True:
        # 读取用户输入的字符
        key = input_win.getch()

        # 处理特殊按键
        if key == curses.KEY_ENTER or key == 10:
            # 执行命令
            execute_command(command)
            command = ""
        elif key == curses.KEY_BACKSPACE or key == 127:
            # 删除最后一个字符
            command = command[:-1]
        else:
            # 添加字符到命令中
            command += chr(key)

        # 清空文本框并显示命令
        input_win.clear()
        input_win.addstr(0, 0, command)
        input_win.refresh()

def execute_command(command):
    # 根据用户输入的命令执行相应的操作
    if command == "save":
        # 保存文件
        pass
    elif command == "quit":
        # 退出程序
        pass
    else:
        # 未知命令
        pass

if __name__ == "__main__":
    curses.wrapper(main)