(self)
Appends an empty column to the grid.
Appends an empty column to the grid.
Appends an empty column to the grid .
def append_column(self):
        """
        Appends an empty column to the grid.
        """
        self._width += 1
        for i in xrange(self._height):
            self._array[i].append(None)
def append_column ( self ) : self . _width += 1 for i in xrange ( self . _height ) : self . _array [ i ] . append ( None )