Netgen/NGSolve is a high performance multiphysics finite element software. It is widely used to analyze models from solid mechanics, fluid dynamics and electromagnetics. Due to its flexible Python interface new physical equations and solution algorithms can be implemented easily.
In the documentation for Define and mesh 2D geometries the first import should be
import netgen.geom2d as geom2d
instead ofimport netgen.geom2d as