Mesh Eval to Python

Hello, Guys!

I study the use of python in a grasshopper. I rewrite the function of the grasshopper in the python code.
I'm trying to make code for such a simple definition for a grasshopper.

The parameter pts = rg.Curve.PointAtNormalizedLength (x, 0.1) does not determine the point in the wrong place, is it possible in some way to make such a definition of a grasshopper on a python? What am I mistaken about?