pythonttkinter复选框总是返回值为0，即使选中它们也是如此

Question

它应该是一个GUI批萨订单，所以它有更多，但我遇到的问题是，当它得到一个变量，它应该是oliveSelection时，它总是返回0，而不是1。在

from tkinter import *
myGui=Tk()
myGui.geometry("800x600")
myGui.title("Pete's Pizza Parlour~Order Form")


TOPPING SELECTION
    toppings_lbl=Label(myGui,text="Toppings:",font=("Good Times",10),fg="blue").pack()
    a=IntVar()
    olives_chk=Checkbutton(myGui,text="Olives",variable=a).pack()
    b=IntVar()
    tomatoes_chk=Checkbutton(myGui,text="Tomatoes",variable=b).pack()
    c=IntVar()
    pepperoni_chk=Checkbutton(myGui,text="Pepperoni",variable=c).pack()
    d=IntVar()
    hotPeppers_chk=Checkbutton(myGui,text="Hot Peppers",variable=d).pack()
    e=IntVar()
    onions_chk=Checkbutton(myGui,text="Onions",variable=e).pack()
    f=IntVar()
    ham_chk=Checkbutton(myGui,text="Ham",variable=f).pack()
    g=IntVar()
    sausage_chk=Checkbutton(myGui,text="Sausage",variable=g).pack()
    h=IntVar()
    greenPeppers_chk=Checkbutton(myGui,text="Green Peppers",variable=h).pack()

olivesSelection=a.get()
tomatoesSelection=b.get()
pepperoniSelection=c.get()
hotPeppersSelection=d.get()
onionsSelection=e.get()
hamSelection=f.get()
sausageSelection=g.get()
greenPeppersSelection=h.get()

olivesSelectionStr="olives"
tomatoesSelectionStr="tomatoes"
pepperoniSelectionStr="pepperoni"
hotPeppersSelectionStr="hot peppers"
onionsSelectionStr="onions"
hamSelectionStr="ham"
sausageSelectionStr="sausage"
greenPeppersSelectionStr="green peppers"
noToppingsStr="no toppings."
def checkToppings():
    toppingsList=""
    if(olivesSelection==1):
        toppingsList=toppingsList+olivesSelectionStr
    elif(tomatoesSelection==1):
        toppingsList=toppingsList+tomatoesSelectionStr
    elif(pepperoniSelection==1):
        toppingsList=toppingsList+pepperoniSelectionStr
    elif(hotPeppersSelection==1):
        toppingsList=toppingsList+hotPeppersSelectionStr
    elif(onionsSelection==1):
        toppingsList=toppingsList+onionsSelectionStr
    elif(hamSelection==1):
        toppingsList=toppingsList+hamSelectionStr
    elif(sausageSelection==1):
        toppingsList=toppingsList+sausageSelectionStr
    elif(greenPeppersSelection==1):
        toppingsList=toppingsList+greenPeppersSelectionStr
    else:
        toppingsList=noToppingsStr

橄榄色选择在选中时总是返回0而不是1 print(olivesSelection)

Answer 1

好吧，有几件事。在

你需要把你的topping.get()放在你的定义里面，这个定义需要添加配料。否则，您只是在运行程序时执行.get()，而不是按需执行

TOPPING SELECTION应该被注释掉，因为它没有其他用途

大的elif树不会对您有帮助，因为一旦您执行if语句True，您就要退出if块。另外，出于个人喜好和代码清洁度的考虑，您可能需要查找字典来了解这一点。一旦超过块中的3或4条if语句，它们就会变得相当混乱。在

另外，我知道您说过还有更多的代码，但是作为一个友好的提醒，以防您忘记了其余代码的底部，请确保您的主窗口实例输入mainloop()

from tkinter import *
myGui=Tk()
myGui.geometry("800x600")
myGui.title("Pete's Pizza Parlour~Order Form")

#TOPPING SELECTION
toppings_lbl=Label(myGui,text="Toppings:",font=("Good Times",10),fg="blue").pack()
a=IntVar()
olives_chk=Checkbutton(myGui,text="Olives",variable=a).pack()
b=IntVar()
tomatoes_chk=Checkbutton(myGui,text="Tomatoes",variable=b).pack()
c=IntVar()
pepperoni_chk=Checkbutton(myGui,text="Pepperoni",variable=c).pack()
d=IntVar()
hotPeppers_chk=Checkbutton(myGui,text="Hot Peppers",variable=d).pack()
e=IntVar()
onions_chk=Checkbutton(myGui,text="Onions",variable=e).pack()
f=IntVar()
ham_chk=Checkbutton(myGui,text="Ham",variable=f).pack()
g=IntVar()
sausage_chk=Checkbutton(myGui,text="Sausage",variable=g).pack()
h=IntVar()
greenPeppers_chk=Checkbutton(myGui,text="Green Peppers",variable=h).pack()

olivesSelectionStr="olives"
tomatoesSelectionStr="tomatoes"
pepperoniSelectionStr="pepperoni"
hotPeppersSelectionStr="hot peppers"
onionsSelectionStr="onions"
hamSelectionStr="ham"
sausageSelectionStr="sausage"
greenPeppersSelectionStr="green peppers"
noToppingsStr="no toppings."


def checkToppings():
    toppingsList=""
    olivesSelection=a.get()
    tomatoesSelection=b.get()
    pepperoniSelection=c.get()
    hotPeppersSelection=d.get()
    onionsSelection=e.get()
    hamSelection=f.get()
    sausageSelection=g.get()
    greenPeppersSelection=h.get()
    if(olivesSelection==1):
        toppingsList=toppingsList+olivesSelectionStr
    if(tomatoesSelection==1):
        toppingsList=toppingsList+tomatoesSelectionStr
    if(pepperoniSelection==1):
        toppingsList=toppingsList+pepperoniSelectionStr
    if(hotPeppersSelection==1):
        toppingsList=toppingsList+hotPeppersSelectionStr
    if(onionsSelection==1):
        toppingsList=toppingsList+onionsSelectionStr
    if(hamSelection==1):
        toppingsList=toppingsList+hamSelectionStr
    if(sausageSelection==1):
        toppingsList=toppingsList+sausageSelectionStr
    if(greenPeppersSelection==1):
        toppingsList=toppingsList+greenPeppersSelectionStr
    if toppingsList=="":
        toppingsList=noToppingsStr
    print(toppingsList)

topping_btn = Button(myGui,text='print toppings', command = checkToppings)
topping_btn.pack()
myGui.mainloop()