This Python script checks whether a given Sudoku grid is valid according to standard Sudoku rules.It ensures that each row, column,and 3x3 sub-grid contains unique numbers(ignoring zeros, which represent empty cells).

• Python 3.x
• A text file (sudoku.txt) containing the Sudoku grid you want to validate.
  • Each row must contain exactly 9 numbers, separated by spaces.
  • The file must have exactly 9 rows.

Example sudoku.txt:

5 3 0 0 7 0 0 0 0
6 0 0 1 9 5 0 0 0
0 9 8 0 0 0 0 6 0
8 0 0 0 6 0 0 0 3
4 0 0 8 0 3 0 0 1
7 0 0 0 2 0 0 0 6
0 6 0 0 0 0 2 8 0
0 0 0 4 1 9 0 0 5
0 0 0 0 8 0 0 7 9

1. The script reads the Sudoku grid from sudoku.txt.
2. It checks each row, column, and 3x3 sub-grid for uniqueness (excluding zeros).
3. If all rules are satisfied, the grid is considered valid.

1. Place your Sudoku grid in a file named sudoku.txt in the same folder as the script.
2. Run the script:

python sudoku_validator.py