old_version/sudoku.py
def increment_digits(self) -> None:
        """
        Each time number is inserted into sudoku element, increment counter.
        If all 9 digits have been inserted, mark element as completed.
        :return: None
        """
        if not self.completed:
            self.digits += 1
            if self.digits == 9:
                self.completed = True
        return None

        Each time number is inserted into sudoku element, increment counter.
        If all 9 digits have been inserted, mark element as completed.
        :return: None
        
Each time number is inserted into sudoku element, increment counter.
If all 9 digits have been inserted, mark element as completed.
Each time number is inserted into sudoku element increment counter . If all 9 digits have been inserted mark element as completed .
def increment_digits(self) -> None:
        if not self.completed:
            self.digits += 1
            if self.digits == 9:
                self.completed = True
        return None
def increment_digits ( self ) -> None : if not self . completed : self . digits += 1 if self . digits == 9 : self . completed = True return None
Each time number is inserted into sudoku element, increment counter.
Each time number is inserted into sudoku element increment counter .
"""
        Each time number is inserted into sudoku element, increment counter.
        If all 9 digits have been inserted, mark element as completed.
        :return: None
        """
None
self