Simple math quiz

Question

My simple math quiz has error it shows that B variable in not defined. I try to defined it as stringvar but still has error.Where should i define the variable?And is my total is the right way to make it continue to calculate fo last interface which is in result box.Can someone shows example to solve it.

import Tkinter 
import tkMessageBox

#easybox1
EasyBox1 = Tkinter.Tk()
EasyBox1.geometry("250x200")
EasyBox1.title("Quesion 1")

Tkinter.Label (EasyBox1, text="answer:").pack()

answr1 = Tkinter.Entry (EasyBox1)
answr1.pack()

LabelName2 = Tkinter.Label (EasyBox1, text="State the number of edges in a cube")
LabelName2.grid(row=1,column=0)
LabelName2.pack()

def next1():
    total = 0
    if not answr1.get():
       tkMessageBox.showerror('no answer')
    elif answr1.get() == 8 :
       total = total + 1
       EasyBox1.withdraw()
       EasyBox2.deiconify()
    elif answr1.get() != 8:
       total = total
       EasyBox1.withdraw()
       EasyBox2.deiconify()
    return

EasyBox2 = Tkinter.Tk()
EasyBox2.geometry("250x200")
EasyBox2.title("Quesion 2")

Tkinter.Label (EasyBox2, text="answer:").pack()

answr2 = Tkinter.Entry (EasyBox2)
answr2.pack()

LabelName2 = Tkinter.Label (EasyBox2, text="What is the place value of the digit 4 in 76421?")
LabelName2.grid(row=1,column=0)
LabelName2.pack()

LabelName2 = Tkinter.Label (EasyBox2, text="A.Thousands B.Hundreds C.Ones D.Tens")
LabelName2.grid(row=1,column=0)
LabelName2.pack()

def mark():
    total = 0
    if not answr2.get():
        tkMessageBox.showerror('no answer')
    elif answr2.get() == B or b :
        total = total + 1
        EasyBox1.withdraw()
        ResultBox.deiconify()
    elif answr2.get() != B :
        total = total
        EasyBox1.withdraw()
        ResultBox.deiconify()
    return


EasyBox2.withdraw()

total = 0


ResultBox = Tkinter.Tk()
ResultBox.geometry("320x260")
ResultBox.title("Results")

LabelName5 = Tkinter.Label (ResultBox, text="Marks : "+`total`, font=("Impact",20))
LabelName5.grid(row=2,column=0)
ResultBox.withdraw()

Tkinter.Button (EasyBox1, text="Next", command=next1).pack()
Tkinter.Button (EasyBox2, text="result", command=mark).pack()

EasyBox1.mainloop()

Answer 1

如果您想将答案与字符串“ B”或“ b”进行比较，只需将其引号

Answer 2

Just put quotation marks around "b" and "B" :

def mark():
    total = 0
    if not answr2.get():
        tkMessageBox.showerror('no answer')
    elif answr2.get() in ["B", "b"]:
        total = total + 1
        EasyBox1.withdraw()
        ResultBox.deiconify()
    else:
        total = total
        EasyBox1.withdraw()
        ResultBox.deiconify()

Also, the comparison with or "b" won't work right now, you could change it to

if answr2.get() in ["B", "b"]:

or

if answr2.get().upper() == "B":