switching to numpy and failing, a user story

[Robert Kern]

Apologies for the dupe. It looked like something went wrong with the first send 
(and the first post was partly incorrect to begin with).

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco