Python脚本启动后重复弹出主菜单的异常问题咨询

启动脚本后会弹出两个主菜单，在第一个主菜单选择「1=Play a Game」后，会再次弹出主菜单，必须再次选择「1」才能进入预期的游戏菜单。

代码示例 #

def mainmenu():
    print("Welcome to the main menu!")
    print("1 = Play a Game")
    mmchoice = input("Choice:")
    return mmchoice

def gamemenu():
    print("Welcome to the game menu!")
    print("1 = Back")
    print("2 = Rock Paper Scissors")
    gmchoice = input("Choice:")
    return gmchoice

def mainmenuchoices():
    choice = mainmenu()
    if choice == "1":
        gamemenu()

mainmenu()
mainmenuchoices()

运行输出 #

Welcome to the main menu!
1 = Play a Game
Choice:1
Welcome to the main menu!
1 = Play a Game
Choice:1
Welcome to the game menu!
1 = Back
2 = Rock Paper Scissors
Choice:

问题原因 #

你同时调用了mainmenu()和mainmenuchoices()两个函数，而mainmenuchoices()内部又主动调用了一次mainmenu()，导致启动时连续触发两次主菜单的渲染逻辑。

解决方法 #

删除单独的mainmenu()调用，只保留mainmenuchoices()的调用即可。修改后的代码如下：

def mainmenu():
    print("Welcome to the main menu!")
    print("1 = Play a Game")
    mmchoice = input("Choice:")
    return mmchoice

def gamemenu():
    print("Welcome to the game menu!")
    print("1 = Back")
    print("2 = Rock Paper Scissors")
    gmchoice = input("Choice:")
    return gmchoice

def mainmenuchoices():
    choice = mainmenu()
    if choice == "1":
        gamemenu()

# 仅保留这一行调用即可触发完整流程
mainmenuchoices()

修改后启动脚本只会显示一次主菜单，选择「1」后可直接进入游戏菜单。

内容的提问来源于stack exchange，提问作者NtownOMG