How to get MayaVi2 to default to/use Qt rather than wx?

Question

Previously I have been using a python environment maintained by Mac ports. I had some basic scripts using PyQT, VTK, matplotlib etc. I have been able to use Paraview but s

Answer 1

After running most of the examples in the Mayavi Gallery I have discovered that I needed to inform Traits to use Qt. This was done by setting an environment variable from within the script using a sys.environment() call. I decided to set the environment variable ETS_TOOLKIT to qt4 in my .profile as follows:**

export ETS_TOOLKIT=qt4

Mayavi2 now works as advertised!