Hello all, one of my students found a typo in the help page for the ring object.
In the example at the top, it says:
ring(pos=vec(0, 0, 0), axis=vec(1, 0, 0), radius = 2, thickness = 0.2. color=color.cyan)
There is a period at the end of the thickness attribute where a comma should be.
FYI,
jd