gottagetgit

def get_groups():
    q = lambda f:[[f(i,j) for j in range(9)] for i in range(9)]
    return q(lambda i,j:(i,j)) + q(lambda i,j:(j,i)) + q(lambda i,j:(i/3*3+j/3,i%3*3+j%3))
    # I think this is more readable than the one-liner:
    # >> return [l for i in range(9) for l in zip(*[[(i,j),(j,i),(i/3*3+j/3,i%3*3+j%3)] for j in range(9)])]

def check_sudoku(grid):
# Check to see if grid is a list with 9 elements
    if ((not type(grid) is list) or (len(grid) != 9)): return None

gottagetgit

# Sudoku solver for Udacity CS258.

def get_groups():
    q = lambda f:[[f(i,j) for j in range(9)] for i in range(9)]
    return q(lambda i,j:(i,j)) + q(lambda i,j:(j,i)) + q(lambda i,j:(i/3*3+j/3,i%3*3+j%3))
    # I think this is more readable than the one-liner:
    # >> return [l for i in range(9) for l in zip(*[[(i,j),(j,i),(i/3*3+j/3,i%3*3+j%3)] for j in range(9)])]

def check_sudoku(grid):
# Check to see if grid is a list with 9 elements