def set_size(self, fontsize):
self._fontproperties.set_size(fontsize)<EOL>
Set the font size.  May be either a size string, relative to
the default font size, or an absolute font size in points.

ACCEPTS: [ size in points | 'xx-small' | 'x-small' | 'small' | 'medium' | 'large' | 'x-large' | 'xx-large' ]