Checkbutton 的 Onvalue 始终 = 0 python

Question

所以在我的程序中，我询问用户他们喜欢什么样的音乐和什么样的电影。我使用检查按钮来评估这些类别中的每一个，问题是按钮的开/关值始终为 0（而不是按下时为 1）。这意味着我永远无法打印出诸如“您单击了 x”之类的语句，因为它永远不会获得该值。

我尝试使音乐 fcn 中的变量与电影 fcn 中的变量相比，我尝试将其更改为“如果 x = 0，则打印您选择 x”，但这只会打印出所有一次声明，而不是单独声明。我怀疑这与在 fcn 中有关，因为它在外面工作得很好。但我不知道该怎么办。

（我也知道这显然不是 HTML sn-p，但由于缩进，我无法通过代码示例将其纳入问题，我是 stackoverflow 的新手，所以不知道还能做什么)

from Tkinter import * 

def movies():
    def chBoxSel():
        C1Var = CheckVar1.get()
        C2Var = CheckVar2.get()
        C3Var = CheckVar3.get()
        C4Var = CheckVar4.get()
        
        if C1Var == 1:
            print "You like Moonlight!"
        if C2Var == 1:
            print "You like Les Choristes!"
        if C3Var == 1:
            print "You like Donnie Darko!"
        if C4Var == 1:
            print "You like Mommy!" 
    #end ChBoxSel() 
    
    top = Tk()

    CheckVar1 = IntVar()
    CheckVar2 = IntVar()
    CheckVar3 = IntVar()
    CheckVar4 = IntVar()
    
    C1 = Checkbutton(top, text = "Moonlight(2016)", variable = CheckVar1,  \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C2 = Checkbutton(top, text = "Les Chorites(2004)", variable = CheckVar2, \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C3 = Checkbutton(top, text = "Donnie Darko(2001)", variable = CheckVar3, \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C4 = Checkbutton(top, text = "Mommy(2014)", variable = CheckVar4, \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel) 

    label = Label(top, text = "Which of these movies do you like?")
    label.grid(row =0, column = 0)
    
    C1.grid(row = 1, column = 0)
    C2.grid(row = 2, column = 0)
    C3.grid(row = 3, column = 0)
    C4.grid(row = 4, column = 0) 

    top.mainloop()
   
        
def music():
    def chBoxSel():
        C1Var = CheckVar1.get()
        C2Var = CheckVar2.get()
        C3Var = CheckVar3.get()
        C4Var = CheckVar4.get() 

        if C1Var == 1:
            print ""
        if C2Var == 1:
            print "You like Kanye West!"
        if C3Var == 1:
            print "You like Mother Mother!"
        if C4Var == 1:
            print "You like ABBA!" 
        
    top = Tk()

    CheckVar1 = IntVar()
    CheckVar2 = IntVar()
    CheckVar3 = IntVar()
    CheckVar4 = IntVar() 
    
    C1 = Checkbutton(top, text = "Childish Gambino", variable = CheckVar1,  \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C2 = Checkbutton(top, text = "Kanye West", variable = CheckVar2, \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C3 = Checkbutton(top, text = "Mother Mother", variable = CheckVar3, \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C4 = Checkbutton(top, text = "ABBA", variable = CheckVar4, \
                     onvalue = 1, offvalue = 0, height = 5, \
                     width = 20, \
                     command = chBoxSel) 

    label = Label(top, text = "Which of these artists do you like?")
    label.grid(row=0, column = 0)
    
    C1.grid(row = 1, column = 0)
    C2.grid(row = 2, column = 0)
    C3.grid(row = 3, column = 0)
    C4.grid(row = 4, column = 0)

    top.mainloop()

root = Tk()

var = IntVar()

label = Label(root, text = "What are/is your favourite...")
label.grid(row=0, column = 0)

R1 = Radiobutton(root, text = "Movies", variable = var, value = 1,\
                 command = movies)
R1.grid(row = 1, column = 0)

R2 = Radiobutton(root, text = "Music", variable = var, value = 2,\
                 command = music)

R2.grid(row = 2, column = 0)

root.mainloop()
    

Answer 1

看起来问题源于您在程序中两次调用 Tk() 和 .mainloop。根据这个答案：Here 这是一个明确的问题。当你实例化'top'时不需要调用Tk()，你需要调用Toplevel()。当您以这种方式创建框架时，您也不需要在框架上调用 mainloop。我在下面更新了您的代码，这似乎工作得很好。

from Tkinter import *

def movies():
    def chBoxSel():
        C1Var = CheckVar1.get()
        C2Var = CheckVar2.get()
        C3Var = CheckVar3.get()
        C4Var = CheckVar4.get()

        if C1Var == 1:
            print "You like Moonlight!"
        if C2Var == 1:
            print "You like Les Choristes!"
        if C3Var == 1:
            print "You like Donnie Darko!"
        if C4Var == 1:
            print "You like Mommy!"
    #end ChBoxSel()

    top = Toplevel()

    CheckVar1 = BooleanVar()
    CheckVar2 = BooleanVar()
    CheckVar3 = BooleanVar()
    CheckVar4 = BooleanVar()

    #CheckVar1.set(True)

    C1 = Checkbutton(top, text = "Moonlight(2016)", variable = CheckVar1,  \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C2 = Checkbutton(top, text = "Les Chorites(2004)", variable = CheckVar2, \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C3 = Checkbutton(top, text = "Donnie Darko(2001)", variable = CheckVar3, \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C4 = Checkbutton(top, text = "Mommy(2014)", variable = CheckVar4, \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)

    label = Label(top, text = "Which of these movies do you like?")
    label.grid(row =0, column = 0)

    C1.grid(row = 1, column = 0)
    C2.grid(row = 2, column = 0)
    C3.grid(row = 3, column = 0)
    C4.grid(row = 4, column = 0)

    #top.mainloop()


def music():
    def chBoxSel():
        C1Var = CheckVar1.get()
        C2Var = CheckVar2.get()
        C3Var = CheckVar3.get()
        C4Var = CheckVar4.get()

        if C1Var == 1:
            print ""
        if C2Var == 1:
            print "You like Kanye West!"
        if C3Var == 1:
            print "You like Mother Mother!"
        if C4Var == 1:
            print "You like ABBA!"

    top = Toplevel()

    CheckVar1 = BooleanVar()
    CheckVar2 = BooleanVar()
    CheckVar3 = BooleanVar()
    CheckVar4 = BooleanVar()

    C1 = Checkbutton(top, text = "Childish Gambino", variable = CheckVar1,  \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C2 = Checkbutton(top, text = "Kanye West", variable = CheckVar2, \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C3 = Checkbutton(top, text = "Mother Mother", variable = CheckVar3, \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)
    C4 = Checkbutton(top, text = "ABBA", variable = CheckVar4, \
                     onvalue = True, offvalue = False, height = 5, \
                     width = 20, \
                     command = chBoxSel)

    label = Label(top, text = "Which of these artists do you like?")
    label.grid(row=0, column = 0)

    C1.grid(row = 1, column = 0)
    C2.grid(row = 2, column = 0)
    C3.grid(row = 3, column = 0)
    C4.grid(row = 4, column = 0)

    #top.mainloop()

root = Tk()

var = BooleanVar()

label = Label(root, text = "What are/is your favourite...")
label.grid(row=0, column = 0)

R1 = Radiobutton(root, text = "Movies", variable = var, value = 1,\
                 command = movies)
R1.grid(row = 1, column = 0)

R2 = Radiobutton(root, text = "Music", variable = var, value = 2,\
                 command = music)

R2.grid(row = 2, column = 0)

root.mainloop()