There are a few guards in place
* Doctests don't accept print statements any more
* There is a unit test that checks that code is syntactically Py3 

Thats not enough to catch .iteritems, for example, but we'll get better 
test coverage over time.



On Saturday, October 14, 2017 at 11:51:01 AM UTC+2, John Cremona wrote:
>
> How can we be sure that new code witten by people (like me) who are 
> not python2/3 experts does not regress? 
>
> Also, I can see that projects which build on top of Sage will one day 
> have to make sure that their code is all python3-compliant (I am 
> thinking of the LMFDB).  What's the simplest way of testing that now, 
> to see where the issues will lie? 
>
> John 
>
> On 13 October 2017 at 20:19, 'Julien Puydt' via sage-devel 
> <sage-...@googlegroups.com <javascript:>> wrote: 
> > Hi, 
> > 
> > Le 13/10/2017 à 17:56, Frédéric Chapoton a écrit : 
> >> Cool, no ? Or maybe nobody cares ? 
> > 
> > Extremely cool! 
> > 
> >> Many things are still not working. The cmp problem has been much 
> >> reduced, but still not fully fixed. On our way is a large-scale unicode 
> >> problem, and maybe another large scale hash problem. 
> > 
> > Why are unicode and hash problems? 
> > 
> > Snark on #sagemath 
> > 
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