Circular import problem

[bvdp]

Just as a bit of a followup, I have fixed the problem in my code. I
changed the order of some of the imports in some other modules.

What I was doing was more guesswork and good luck ... but it works. I
really wonder if there is a better way to figure these problems out.
Reading a few of the other discussions on the 'net about this it seems
that I'm not the 1st to get hit with the problem ... and the solutions
I find aren't any prettier than mine :)