QA Math

from tkinter import *
import random

class Application(Frame):

    def __init__(self, master, *args, **kwargs):
        Frame.__init__(self, master, *args, **kwargs)

        self.score = 0
        self.question_count = 0

        self.createWidgets()
        self.random_question()

    def replaceText(self, text):
        self.display.delete(0, END)
        self.display.insert(0, text)

    def calculateExpression(self):
        self.expression = self.display.get()

        try:
            self.result = eval(self.expression)
            self.replaceText(self.result)
        except:
            messagebox.showinfo("Error", "Invalid Input")

    def appendToDisplay(self, text):
        self.entryText = self.display.get()
        self.textLength = len(self.entryText)

        if self.entryText == "0":
            self.replaceText(text)
        else:
            self.display.insert(self.textLength, text)

    def clearText(self):
        self.replaceText("0")

    def createWidgets(self):
        self.display = Entry(self, font = ("Calibri", 16), borderwidth = 1, relief = RAISED, justify = RIGHT)
        self.display.insert(0, "0")
        self.display.grid(row = 0, column = 0, columnspan = 4)

        self.sevenButton = Button(self, font = ("Calibri", 15), text = "7", borderwidth = 1, command = lambda: self.appendToDisplay("7"))
        self.sevenButton.grid(row=1, column=0, sticky="NWNESWSE")

        self.eightButton = Button(self, font = ("Calibri", 15), text = "8", borderwidth = 1, command = lambda: self.appendToDisplay("8"))
        self.eightButton.grid(row=1, column=1, sticky="NWNESWSE")

        self.nineButton = Button(self, font = ("Calibri", 15), text = "9", borderwidth = 1, command = lambda: self.appendToDisplay("9"))
        self.nineButton.grid(row=1, column=2, sticky="NWNESWSE")

        self.clearButton = Button(self, font=("Calibri", 15), text = "C", borderwidth = 1, command = lambda: self.clearText())
        self.clearButton.grid(row = 1, rowspan = 2, column = 3, sticky = "NWNESWSE")


        self.fourButton = Button(self, font = ("Calibri", 15), text = "4", borderwidth = 1, command = lambda: self.appendToDisplay("4"))
        self.fourButton.grid(row = 2, column = 0, sticky = "NWNESWSE")

        self.fiveButton = Button(self, font = ("Calibri", 15), text = "5", borderwidth = 1, command = lambda: self.appendToDisplay("5"))
        self.fiveButton.grid(row = 2, column = 1, sticky = "NWNESWSE")

        self.sixButton = Button(self, font = ("Calibri", 15), text = "6", borderwidth = 1, command = lambda: self.appendToDisplay("6"))
        self.sixButton.grid(row = 2, column = 2, sticky = "NWNESWSE")


        self.oneButton = Button(self, font = ("Calibri", 15), text = "1", borderwidth = 1, command = lambda: self.appendToDisplay("1"))
        self.oneButton.grid(row = 3, column = 0, sticky = "NWNESWSE")

        self.twoButton = Button(self, font = ("Calibri", 15), text = "2", borderwidth = 1, command = lambda: self.appendToDisplay("2"))
        self.twoButton.grid(row = 3, column = 1, sticky = "NWNESWSE")

        self.threeButton = Button(self, font = ("Calibri", 15), text = "3", borderwidth = 1, command = lambda: self.appendToDisplay("3"))
        self.threeButton.grid(row = 3, column = 2, sticky = "NWNESWSE")

        self.OKButton = Button(self, font = ("Calibri", 15), text = "OK", borderwidth = 1, command=self.test_answer)
        self.OKButton.grid(row = 3, rowspan = 2, column = 3, sticky = "NWNESWSE")


        self.zeroButton = Button(self, font = ("Calibri", 15), text = "0", borderwidth = 1, command = lambda: self.appendToDisplay("0"))
        self.zeroButton.grid(row = 4, column = 0, columnspan = 2, sticky = "NWNESWSE")

        self.dotButton = Button(self, font = ("Calibri", 15), text = ".", borderwidth = 1, command = lambda: self.appendToDisplay("."))
        self.dotButton.grid(row = 4, column = 2, sticky = "NWNESWSE")

        self.question = Label(self)
        self.question.grid(row=5, column=0, columnspan = 4)
        self.info = Label(self)
        self.info.grid(row=6, column=0, columnspan = 4)

    #generates a random math problem
    def random_question(self):
        func = ["plus", "minus", "times",]
        x = random.randint(1, 99)
        y = random.randint(1, 99)
        function = random.choice(func)

        if function == "plus":
            self.correct_answer = str(x + y)
        elif function == "minus":
            self.correct_answer = str(x - y)
        elif function == "times":
            self.correct_answer = str(x * y)

        self.question['text'] = "%d %s %d" % (x, function, y)

    def test_answer(self):
        self.question_count = self.question_count+1
        answer = self.display.get()

        if self.correct_answer == answer:
            self.info['text'] = "Correct! (%d)" % self.question_count
            self.score = self.score+1
        else:
            self.info['text'] = "Incorrect (%d)" % self.question_count

        if self.question_count < 10:
            self.random_question()
        else:
            self.question['text'] = "Test over"
            self.info['text'] = "You got %d out of 10" % score

#    def test(self):
#        while question_count < 10:
#            random_question()
#        while question_count == 10:
#            print("Test over")
#            print("You got", score, "out of 10,", name)
#            question_count = 11

root = Tk()
root.title("Calculator")
root.resizable(0, 0)

Application(root).pack()

root.mainloop()