def font(self, fontname=None, fontsize=None):
if fontname is not None and fontsize is not None:
return CanvasContext.font(self, fontname, fontsize)
elif fontname is not None:
return CanvasContext.font(self, fontname)
elif fontsize is not None:
CanvasContext.fontsize(self, fontsize)
return CanvasContext.font(self)
