Sudoku Solver Python

from tkinter import *

root = Tk()
root.geometry('275x283')


# Solve the Sudoku
class SolveSudoku():


    def __init__(self):
        self.allZero()
        self.startSolution()


    def allZero(self):
        for i in range(9):
            for j in range(9):
                if savedNumbers[i][j].get() not in ['1','2','3','4','5','6','7','8','9']:
                    savedNumbers[i][j].set(0)


    def startSolution(self, i=0, j=0):
        i,j = self.findNextCellToFill(i, j)

        if i == -1:
            return True
        for e in range(1,10):
            if self.isValid(i,j,e):
                savedNumbers[i][j].set(e)
                if self.startSolution(i, j):
                    return True
                savedNumbers[i][j].set(0)
        return False

    def findNextCellToFill(self, i, j):

        for x in range(i,9):
            for y in range(j,9):
                if savedNumbers[x][y].get() == '0':
                    return x,y

        for x in range(0,9):
            for y in range(0,9):
                if savedNumbers[x][y].get() == '0':
                    return x,y

        return -1,-1


    def isValid(self, i, j, e):

        for x in range(9):
            if savedNumbers[i][x].get() == str(e):
                return False

        for x in range(9):
            if savedNumbers[x][j].get() == str(e):
                return False

        secTopX, secTopY = 3 *int((i/3)), 3 *int((j/3))
        for x in range(secTopX, secTopX+3):
            for y in range(secTopY, secTopY+3):
                if savedNumbers[x][y].get() == str(e):
                    return False

        return True




class Launch():
    def __init__(self, master):
        self.master = master
        master.title("Sudoku Solver thing majiggy")

        font = ('Arial', 18)
        color = 'white'
        px, py = 0, 0

        self.__table = []
        for i in range(1,10):
            self.__table += [[0,0,0,0,0,0,0,0,0]]

        for i in range(0,9):
            for j in range(0,9):

                if (i < 3 or i > 5) and (j < 3 or j > 5):
                    color = 'gray'
                elif i in [3,4,5] and j in [3,4,5]:
                    color = 'gray'
                else:
                    color = 'white'

                self.__table[i][j] = Entry(master, width = 2, font = font, bg = color, cursor = 'arrow', borderwidth = 0,
                                          highlightcolor = 'yellow', highlightthickness = 1, highlightbackground = 'black',
                                          textvar = savedNumbers[i][j])
                self.__table[i][j].bind('<Motion>', self.correctGrid)
                self.__table[i][j].bind('<FocusIn>', self.correctGrid)
                self.__table[i][j].bind('<Button-1>', self.correctGrid)
                self.__table[i][j].grid(row=i, column=j)


        menu = Menu(master)
        master.config(menu = menu)

        file = Menu(menu)
        menu.add_cascade(label = 'File', menu = file)
        file.add_command(label = 'Exit', command = master.quit)
        file.add_command(label = 'Solve', command = self.solveInput)
        file.add_command(label = 'Clear', command = self.clearAll)

    def correctGrid(self, event):
        for i in range(9):
            for j in range(9):
                if savedNumbers[i][j].get() == '':
                    continue
                if len(savedNumbers[i][j].get()) > 1 or savedNumbers[i][j].get() not in ['1','2','3','4','5','6','7','8','9']:
                    savedNumbers[i][j].set('')


    def clearAll(self):
        for i in range(9):
            for j in range(9):
                savedNumbers[i][j].set('')

    def solveInput(self):
        solution = SolveSudoku()

savedNumbers = []
for i in range(1,10):
    savedNumbers += [[0,0,0,0,0,0,0,0,0]]
for i in range(0,9):
    for j in range(0,9):
        savedNumbers[i][j] = StringVar(root)


app = Launch(root)
root.mainloop()
#PLEASE CHECK OUT MY YT VIDEO ABOUT THIS, https://www.youtube.com/watch?v=vJgIuACk7uE
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