python3 integer division debugging

[random832 at fastmail.us]

On Wed, Aug 28, 2013, at 11:15, Neal Becker wrote:
> The change in integer division seems to be the most insidious source of
> silent 
> errors in porting code from python2 - since it changes the behaviour or
> valid 
> code silently.
> 
> I wish the interpreter had an instrumented mode to detect and report such 
> problems.

There is such a mode in python2 from version 2.2 through 2.7: -Q warn.