sudoku_display.py

def display(values):
    """
    Display the values as a 2-D grid.
    Input: The sudoku in dictionary form
    Output: None
    """
    print('')
    
    rows = 'ABCDEFGHI'
    cols = '123456789'
    boxes = cartesian_product(rows, cols)
    
    width = 1+max(len(values[s]) for s in boxes)
    line = '+'.join(['-'*(width*3)]*3)
    for r in rows:
        print(''.join(values[r+c].center(width)+('|' if c in '36' else '')
                    for c in cols))
        if r in 'CF': print(line)
    return