def column_length(self, column: int) -> int:
        """Gives the number of active grid cells in a column.

        Parameters
        ----------
        column
            A column in the window, must be within 0 < column < n+1

        Returns
        -------
        int
            The number of active grid cells in a column.
        """
Gives the number of active grid cells in a column.

        Parameters
        ----------
        column
            A column in the window, must be within 0 < column < n+1

        Returns
        -------
        int
            The number of active grid cells in a column.
        
darts/dataprocessing/dtw/window.py