Question

我为GUI程序编写了这段代码。问题是问题1 - 第14章 - 问题6 -

Joe's Automotive执行以下日常维护服务：

Oil Change--$26.00
Lube Job--#18.00
Radiator Flush--#30.00
Transmission Flush--$80.00
Inspection--$15.00
Muffler replacement--$100.00
Tire Rotation--$20.00

编写带有检查按钮的GUI程序，允许用户选择任何或所有这些服务。当用户单击按钮时，应显示总费用。这是我的代码，所以有人可以告诉我为什么它不起作用？

##############################################################################
#
#
#               Name: Marc DiFalco
# 
#               Lab: 13
#
#               Description: GUI Lab on instructions
#
#
#
#          Inputs: Type of job
#          Outputs: Job done and price
#          Variables:CheckVar1,CheckVar2,CheckVar3,CheckVar4,CheckVar5,CheckVar6,
#                    CheckVar7, totalvalue
#
#
#
#
#
###############################################################################
#import
from tkinter import *

root=Tk()
root.title("Some GUI")
root.geometry("400x700")
CheckVar1=IntVar()
CheckVar2=IntVar()
CheckVar3=IntVar()
CheckVar4=IntVar()
CheckVar5=IntVar()
CheckVar6=IntVar()
CheckVar7=IntVar()#Set the variables
totalvalue=0

#The user can check off which jobs they would like to purchase

Oil=Checkbutton(root,text="Oil Change 20.00",variable=CheckVar1,onvalue=20\
                ,offvalue=0,height=5,width=20)
Lube=Checkbutton(root,text="Lube Job 18.00",variable=CheckVar2,onvalue=18\
                ,offvalue=0,height=5,width=20)
RadiatorFlush=Checkbutton(root,text="Radiator Flush--$30.00",variable=CheckVar3,onvalue=30\
                ,offvalue=0,height=5,width=20)
Transmission=Checkbutton(root,text="Transmission Flush--80.00",variable=CheckVar4,onvalue=80\
                ,offvalue=0,height=5,width=20)
Inspection=Checkbutton(root,text="Inspection--15.00",variable=CheckVar5,onvalue=15\
                ,offvalue=0,height=5,width=20)
Muffler=Checkbutton(root,text="Muffler replacement--100.00",variable=CheckVar6,onvalue=100\
                ,offvalue=0,height=5,width=20)
Tire=Checkbutton(root,text="Tire Rotation--20.00",variable=CheckVar7,onvalue=20\
                ,offvalue=0,height=5,width=20)
somebutton=Button(root, text="Total")

#Call each job
Oil.pack()
Lube.pack()
RadiatorFlush.pack()
Transmission.pack()
Inspection.pack()
Muffler.pack()
Tire.pack()
somebutton.pack()


#main loop
root.mainloop()

Answer 1

那是因为你从未计算总数。要解决此问题，您需要：

制作标签以保留总数。
构建一个函数，该函数将获取所有IntVar s'值，求它们，然后更改标签的文本以显示总数。
将somebutton绑定到该功能。

以下是该脚本的固定版本：

from tkinter import *

root=Tk()
root.title("Some GUI")
root.geometry("400x700")
CheckVar1=IntVar()
CheckVar2=IntVar()
CheckVar3=IntVar()
CheckVar4=IntVar()
CheckVar5=IntVar()
CheckVar6=IntVar()
CheckVar7=IntVar()
totalvalue=0


Oil=Checkbutton(root,text="Oil Change 20.00",variable=CheckVar1,onvalue=20\
                ,offvalue=0,height=5,width=20)
Lube=Checkbutton(root,text="Lube Job 18.00",variable=CheckVar2,onvalue=18\
                ,offvalue=0,height=5,width=20)
RadiatorFlush=Checkbutton(root,text="Radiator Flush--$30.00",variable=CheckVar3,onvalue=30\
                ,offvalue=0,height=5,width=20)
Transmission=Checkbutton(root,text="Transmission Flush--80.00",variable=CheckVar4,onvalue=80\
                ,offvalue=0,height=5,width=20)
Inspection=Checkbutton(root,text="Inspection--15.00",variable=CheckVar5,onvalue=15\
                ,offvalue=0,height=5,width=20)
Muffler=Checkbutton(root,text="Muffler replacement--100.00",variable=CheckVar6,onvalue=100\
                ,offvalue=0,height=5,width=20)
Tire=Checkbutton(root,text="Tire Rotation--20.00",variable=CheckVar7,onvalue=20\
                ,offvalue=0,height=5,width=20)

##################################################################
total_lbl = Label(root)
def click():
    total = 0
    for var in (CheckVar1, CheckVar2, CheckVar3, CheckVar4, CheckVar5, CheckVar6, CheckVar7):
        total += var.get()
    total_lbl.config(text="${}.00".format(total))
somebutton=Button(root, text="Total", command=click)
###################################################################

Oil.pack()
Lube.pack()
RadiatorFlush.pack()
Transmission.pack()
Inspection.pack()
Muffler.pack()
Tire.pack()
somebutton.pack()

###############
total_lbl.pack()
###############

root.mainloop()

我更改的内容在评论框中。

python 3.3 GUI编程

1 个答案: