def set_alignment(self, new_alignment):
self.__alignment = new_alignment<EOL>self._repack()<EOL>
Set how this widget will be positioned within the space assigned to 
it.

The alignment can be either a string or a function.  For more 
information, see the tutorial on `padding_alignment_size_hints` or the 
API documentation for the `glooey.drawing.alignment` module.