----- Original Message ----- > On Tue, 2013-07-23 at 02:40 -0400, Bohuslav Kabrda wrote: > > > python2 and python3 are separate languages. There is a lot of > > similarity > > > between the two and with recent enough versions of python2 (2.7) and > > python3 > > > (python3.4) and some external libraries (python-six) and by sticking > > to some > > > specific coding styles ( http://python3porting.com/noconv.html ) and > > by > > > sometimes resorting to having separate files for some > > python2-specific > > > routines vs python3-specific routines you can write code that is > > valid and > > > runs under either language. That does not mean that they are the > > same > > > language. > > > > > > > The problem is that you're basically saying "my mental model is the > > right one", which is not necessarily true for everyone (and not > > necessarily true generally). Taking your arguments a bit further, > > Python 2.6 and 2.7 are different languages too, since there are some > > backward incompatible additions to Python 2.7. > > Python 2.7 might not be backward compatible with 2.6 or 2.5 but 2.5 and > 2.6 is forward compatible with 2.7, which is not true for python 2.* vs > 3.*. > Good point, but not entirely true, IMHO. If you look at Python 2.7 release notes [1], you'll find out that e.g. float-int conversions round differently. So if you targeted your code for 2.6 working under the assumption that the rounding will have a certain result, your script will likely break (e.g. what you wrote for 2.6 may fail in 2.7). > That makes them more of different languages than 2.6 vs 2.7. > > Pierre [1] http://docs.python.org/dev/whatsnew/2.7.html -- Regards, Bohuslav "Slavek" Kabrda. -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
