from Tkinter import *
import random

class Application(Frame):
    def __init__(self, master):
        Frame.__init__(self, master)
        self.grid()
        self.good = 0
        self.total = 0
        self.create_widgets()
    def create_widgets(self):
        self.n1 = random.randrange(-50, 50)
        self.n2 = random.randrange(-50, 50)
        self.q = StringVar()
        self.question = Label(self, textvariable=self.q)
        self.q.set("What is" + str(self.n1) + " + " + str(self.n2) + "?")
        self.question.grid(row=0,column=0,columnspan=2)
        self.label = Label(self, text="Enter your answer here: ")
        self.label.grid(row=1,column=0)
        self.user = Entry(self)
        self.user.grid(row=1,column=1)
        self.anotherLabel = Label(self, text="When done please press")
        self.anotherLabel.grid(row=2,column=0)
        self.submit_bttn = Button(self,text="Submit", command=self.reveal)
        self.submit_bttn.grid(row=2,column=1)
        self.v = StringVar()
        self.answer = Label(self, textvariable=self.v)
        self.answer.grid(row=3,column=0,columnspan=2)
        self.v.set("The game so far: 0 out of 0 correct.")

    def reveal(self):
        guess = self.user.get()
        if int(guess) == self.n1 + self.n2:
            self.good += 1;
        self.total += 1;
        self.v.set("The game so far: " + str(self.good) + " out of " + str(self.total) + " correct.")
        self.n1 = random.randrange(-50, 50)
        self.n2 = random.randrange(-50, 50)
        self.q.set("What is" + str(self.n1) + " + " + str(self.n2) + "?")
        self.user.delete(0, END)


root= Tk()
root.title("Quiz program")
root.geometry("250x150")
app = Application(root)
root.mainloop()