Writing backwards compatible code - when?

[Scott David Daniels]

Bob Greschke wrote:
> Is there a list of all of the Python commands and modules that tell when 
> (what version) they were added to Python?  I was hoping the new Essential 
> Reference would have it, but it doesn't.

Here's a reference that stops at 2.3:

     http://rgruet.free.fr/PQR2.3.html

--Scott David Daniels
scott.daniels at acm.org