Introducing python3 into user system

[Ruslan Makhmatkhanov]

Gerhard Schmidt wrote on 10/17/2016 11:07:
> Am 16.10.2016 um 21:22 schrieb Ruslan Makhmatkhanov:
>> - if port has a build dependency upon python and it can be built both
>> with python2 and python3, force it to build with python3
>> - if some standalone application can be running both with python2 and
>> python3 and it have equivalent python3 dependencies, force it to be run
>> with python3
>
> What do you mean by "force it"?.

I mean set USES=python3.3+ for such ports.

> I agree python3 should be the default choice for all ports that can be
> installed with both python 2 and 3 if there is no python on the system.
> if python2 is already installed and python3 is not python2 should be
> used to reduce possible incompatibilities between programs.
>
> Regards
>   Estartu

Please see my comments to Vlad's response. This does not involve python 
"libraries" and standalone ports that depend on such "libraries".

-- 
Regards,
Ruslan

T.O.S. Of Reality