在tkinter中创建一个结束主循环并开始新循环的函数

Question

我今天正在使用Tkinter编写我的第一个GUI程序，我偶然发现了一个问题。我正在尝试制作一款游戏，它从一个介绍窗口开始，在你按下按钮后关闭，然后打开一个新窗口，你可以在其中选择两种模式之一。不幸的是，我就是无法运行它。它看起来有点像这样。

#These are the functions that I defined to make it work
def start():
root.destroy()
def Rules_mode_1():
root.destroy
rules1 = Tk()
understood1 = Button(rules1, text="I understood", command="Start_game_mode_1")
understood.pack()
rules1.mainloop
# I haven't added rules 2 yet cause I couldn't get it to work with rules 1 so I haven't even #bothered but it would be the same code just switching the 1 for a 2. But really it isn't even 
#necessary to have 2 different rule functions because the rules are the same but I couldn't think
#of another way to go about it. if you have an idea let me know
def Start_game_mode_1(): 
rules1.destroy #<----- THIS IS WHERE THE PROBLEM LIES. JUST DOESN'T RUN 
gamemode1 = Tk()
#Here I would have the game
gamemode1.mainloop() 
#now same here don't have gamemode 2 yet cause it just doesn't work yet
#This is where it really starts    
root = Tk()
startbutton = Button(root, text="Start", command=start)
startbutton.pack
root.mainloop
root  = Tk()
def mode():
mode1 = Button(root, command=Rules_mode_1)
mode1.pack
mode2 = #Buttonblablabla
mode()
root.mainloop()

现在我已经试了几个小时，试图给主循环取不同的名字。例如，给出

rules1.mainloop
#the name
root.mainloop

但这显然没有奏效。我尝试了几十个辅助函数和lambda表达式，做了几个小时的研究，但似乎无法修复。有人有什么想法吗？请尊重并记住这是我第一次使用Tkinter。

谢谢你的帮助！

Answer 1

在这些评论对我没有真正帮助之后，我只是尝试了几个小时，以防有人遇到类似的问题，并阅读到：rules1变量在一个函数中，因此只是局部变量，这意味着它不能在另一个函数中将其销毁。我通过将其设置为全局来修复它，比如：

def Rules_mode_1():
root.destroy
global rules1
rules1 = Tk()
understood1 = Button(rules1, text="I understood", command="Start_game_mode_1")
understood.pack()
rules1.mainloop

之后，我可以在下一个函数中破坏主循环。