write a sudoku solution verifier in python.
that is, given a list of lists, representing a solution to an nxn sudoku puzzle, verify that the solution is a correct sudoku solution:
fn ([[1,2],[2,1]]) # True fn ([[1,3],[2,1]]) # False
(question seen as a Udacity programming course homework question)
highlight to see a solution:
def fn(x): b = [(j + 1) for j in range(0,len(x))] for i in x: if sorted(i) != b: return False return True