[HvA] Automatic sudoku solver

sudokusolver.py

import time
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.common.exceptions import NoSuchElementException

idRow =     [["00", "01", "02", "03", "04", "05", "06", "07", "08"],
            ["10", "11", "12", "13", "14", "15", "16", "17", "18"],
            ["20", "21", "22", "23", "24", "25", "26", "27", "28"],
            ["30", "31", "32", "33", "34", "35", "36", "37", "38"],
            ["40", "41", "42", "43", "44", "45", "46", "47", "48"],
            ["50", "51", "52", "53", "54", "55", "56", "57", "58"],
            ["60", "61", "62", "63", "64", "65", "66", "67", "68"],
            ["70", "71", "72", "73", "74", "75", "76", "77", "78"],
            ["80", "81", "82", "83", "84", "85", "86", "87", "88"]]

puzzle = []

def findNextCellToFill(grid, i, j):
    for x in range(i, 9):
        for y in range(j, 9):
            if grid[x][y] == 0:
                return x, y
    for x in range(0, 9):
        for y in range(0, 9):
            if grid[x][y] == 0:
                return x, y
    return -1, -1

def isValid(grid, i, j, e):
    rowOk = all([e != grid[i][x] for x in range(9)])
    if rowOk:
        columnOk = all([e != grid[x][j] for x in range(9)])
        if columnOk:
            secTopX, secTopY = 3 * (i//3), 3 * (j//3)
            for x in range(secTopX, secTopX+3):
                for y in range(secTopY, secTopY+3):
                    if grid[x][y] == e:
                        return False
            return True
    return False

def solveSudoku(grid, i=0, j=0):
    i, j = findNextCellToFill(grid, i, j)
    if i == -1:
        return True
    for e in range(1, 10):
        if isValid(grid, i, j, e):
            grid[i][j] = e
            if solveSudoku(grid, i, j):
                return True
            grid[i][j] = 0
    return False

def checkIfSpanExists(xPath):
    try:
        value = driver.find_element_by_xpath(xPath).text
    except NoSuchElementException:
        value = 0
    return int(value)

def checkIfInputExists(xPath, number):
    try:
        driver.find_element_by_xpath(xPath).send_keys(number)
    except NoSuchElementException:
        pass

driver = webdriver.Chrome()
driver.get(
    "https://testdrive-archive.azurewebsites.net/Performance/Sudoku/Default.html")
for list in idRow:
    row = []
    for id in list:
        cssPath = '//*[@id="' + id + '"]/span'
        row.append(checkIfSpanExists(cssPath))
    puzzle.append(row)

solveSudoku(puzzle)

for list in puzzle:
    for i in list:
        listIndex = puzzle.index(list)
        index = list.index(i)
        cssPath = '//*[@id="' + idRow[listIndex][index] + '"]/input'
        checkIfInputExists(cssPath, i)

input("Press enter to close this window.")