Python 2 to 3 conversion - embrace the pain

[Terry Reedy]

On 3/16/2015 4:31 AM, Paul Rubin wrote:

> sure why numpy couldn't go in the stdlib: does it change all that fast?

First there was Numerical Python, the first killer app (though a 
library) for Python.  Then there was was NumArray by a competing group, 
with some not-quite forward compatible changes.  This somewhat split 
scientific Python computing.  This was not good.  Then some some people 
(successfully) reunified things with numpy, which drew on both 
numberical_python and numarray.  I guess things are pretty stable now, 
but not static.

In any case, the developer groups are separate, and both codebases are 
pretty large.  Having to compile both to work on either would be a nuisance.

-- 
Terry Jan Reedy