Coverage for pyguymer3/checkSudokuBoard.py: 5%

1#!/usr/bin/env python3 

2 

3# Define function ... 

4def checkSudokuBoard( 

5 board, 

6 /, 

7): 

8 """Check a Sudoku board is valid 

9 

10 This function reads in a 2D array representing the values in a Sudoku board 

11 and check that it is valid. 

12 

13 Parameters 

14 ---------- 

15 board : numpy.ndarray 

16 the Sudoku board 

17 

18 Returns 

19 ------- 

20 valid : bool 

21 the validity of the Sudoku board 

22 

23 Notes 

24 ----- 

25 Copyright 2017 Thomas Guymer [1]_ 

26 

27 References 

28 ---------- 

29 .. [1] PyGuymer3, https://github.com/Guymer/PyGuymer3 

30 """ 

31 

32 # Import special modules ... 

33 try: 

34 import numpy 

35 except: 

36 raise Exception("\"numpy\" is not installed; run \"pip install --user numpy\"") from None 

37 

38 # Check arguments ... 

39 if not isinstance(board, numpy.ndarray): 

40 raise TypeError("\"board\" is not a NumPy array") from None 

41 if board.shape != (9, 9): 

42 raise TypeError("\"board\" is not the correct shape") from None 

43 

44 # Loop over numbers ... 

45 for num in range(1, 10): 

46 # Loop over columns ... 

47 for iy in range(9): 

48 # Check that the number is not in the row more than once ... 

49 if (board[iy, :] == num).sum() > 1: 

50 # Return answer ... 

51 return False 

52 

53 # Loop over rows ... 

54 for ix in range(9): 

55 # Check that the number is not in the column more than once ... 

56 if (board[:, ix] == num).sum() > 1: 

57 # Return answer ... 

58 return False 

59 

60 # Loop over y-squares ... 

61 for sy in range(3): 

62 # Loop over x-squares ... 

63 for sx in range(3): 

64 # Check that the number is not in the square more than once ... 

65 if (board[sy * 3:(sy + 1) * 3, sx * 3:(sx + 1) * 3] == num).sum() > 1: 

66 # Return answer ... 

67 return False 

68 

69 # Return answer ... 

70 return True