[Distutils] Alternates in SetupTools dependencies?

[Mike C. Fletcher]

I'm starting to package OpenGLContext as a series of .eggs but I seem to 
be missing something key:

    What's the syntax for declaring "I require numpy or Numeric"

I could declare them as "extras", but it's not that they are 
individually extras, one or the other is *required* for the PyVRML97 
library.  Similar problem with "PyGame or PyGame-ctypes" they are 
work-alikes (or closely enough to use either) and we can work with 
whichever one is installed (preferably choosing the items in order to 
attempt installation).

I don't see any documentation for this (extremely common) case on the 
setuptools page.  Is it just some obvious thing that I'm missing?

Thanks all,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com