36. Valid Sudoku leetcode Python new season 2016

Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.

The Sudoku board could be partially filled, where empty cells are filled with the character 

'.'

.



A partially filled sudoku which is valid.

Note:

A valid Sudoku board (partially filled) is not necessarily solvable. Only the filled cells need to be validated.

class Solution(object):
def valid(self, x, y, tmp, board):
for i in range(9):
if board[i][y] == tmp:
return False
for j in range(9):
if board[x][j] == tmp:
return False
for i in range(3):
for j in range(3):
if board[(x / 3) * 3 + i][( y / 3) * 3 + j] == tmp:
return False
return True
def isValidSudoku(self, board):
"""
:type board: List[List[str]]
:rtype: bool
"""
for i in range(9):
for j in range(9):
if board[i][j] == '.':
continue
tmp = board[i][j]
board[i][j] = 'D'
if self.valid(i, j, tmp, board) == False:
return False
board[i][j] = tmp
return True