selectedSquare = move_y
if event.key == K_LEFT:
move_x = selectedSquare - 1
if 0 <= move_x <= 80 and selectedSquare % 9 != 0: # ignoring suggestion for readability.
selectedSquare = move_x
if event.key == K_RIGHT:
move_x = selectedSquare + 1
if 0 <= move_x <= 80 and selectedSquare % 9 != 8:
selectedSquare = move_x
if event.key in numberMap:
puzzle.set_number(selectedSquare, numberMap[event.key])
if event.key == K_0 or event.key == K_KP0 or event.key == K_DELETE or event.key == K_BACKSPACE:
puzzle.set_number(selectedSquare, 0)
# Update Sudoku to ensure all values have accurate validity.
puzzleCompleted = puzzle.check_puzzle()
# update the screen with grid / numbers
screen.blit(background, (0, 0))
for r in range(9):
for c in range(9):
loc_s = 9 * r + c
loc_x = squareWidth * c + sum_array(
spaces[:c + 1]
) # calculate the x,y position of the square on screen.
loc_y = squareWidth * r + sum_array(spaces[:r + 1])
# Determine the background color:
sqrColor = lightSquareColor
# Determine the text color:
