Draw line and rotate it

[lilio]

Hey,
I've got another idea, to solve my problem. But therefore I should know, how to get the euler of my line.

So I draw a line like this:

begin = [0,0,0]
end = [2,1,2]

viz.startlayer(viz.LINES)
viz.linewidth(2)
viz.vertexcolor(viz.RED)
viz.vertex(begin)
viz.vertex(end)
viz.startlayer(viz.POINTS)
viz.pointsize(3)
viz.vertex(begin)		
viz.vertex(end)
dr = viz.endlayer()

And now I want to get the euler of this line.

But If I make

print dr.getEuler()

it is always [0, 0, 0].


Is it possible to get the euler of a drawn line?

Or the angles between the axes and my line.

Thanks a lot for all your help!