Sudoku Checker I | Python Fiddle

#!/usr/bin/python
# -*- encoding: utf-8 -*-

__author__ = 'preuss'

sudoku = ((0, 1, 2, 3, 4, 5, 6, 7, 8),  # incorrect sudoku
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
          (0, 1, 2, 3, 4, 5, 6, 7, 8),
)
sudoku = ((8, 3, 5, 4, 1, 6, 0, 2, 7),  # correct sudoku
          (2, 0, 6, 8, 5, 7, 4, 3, 1),
          (4, 1, 7, 2, 0, 3, 6, 5, 8),
          (5, 6, 0, 1, 3, 4, 7, 8, 2),
          (1, 2, 3, 6, 7, 8, 5, 4, 0),
          (7, 4, 8, 5, 2, 0, 1, 6, 3),
          (6, 5, 2, 7, 8, 1, 3, 0, 4),
          (0, 8, 1, 3, 4, 5, 2, 7, 6),
          (3, 7, 4, 0, 6, 2, 8, 1, 5))

def line_check(line):
    return set(line) == set(range(9))

# http://stackoverflow.com/questions/19339/a-transpose-unzip-function-in-python-inverse-of-zip
def transpose_sudoku(sudoku):
    return zip(*sudoku)

def block_sudoku(sudoku):
    '''
    Da Sie noch keine List-Comprehension kennen: hier die Langversion:
    sp_sudoku = []
    for x in 0,3,6:
        for y in 0,3,6:
            sp_sudoku.append([sudoku[x][y], sudoku[x+1][y], sudoku[x+2][y],
                  sudoku[x][y+1], sudoku[x+1][y+1], sudoku[x+2][y+1],
                  sudoku[x][y+2], sudoku[x+1][y+2], sudoku[x+2][y+2],
             ])
    return sp_sudoku
    '''
    return [[sudoku[x + i][y + j] for i in 0, 1, 2 for j in 0, 1, 2] for x in 0, 3, 6 for y in 0, 3, 6]

def simple_check(s):
    for line in s:
        if not line_check(line):
            return False
    return True

def complete_check(sudoku):
    return simple_check(sudoku) and simple_check(transpose_sudoku(sudoku)) and simple_check(block_sudoku(sudoku))

if __name__ == '__main__':
    print(complete_check(sudoku))

Python Fiddle

Python Cloud IDE