Note that there is also an approach of having simultaneously 2.x and 3.x compatible codebase without a need of using 2to3. Allegedly, this is used in SymPy, NumPy and SciPy projects. See http://ondrejcertik.blogspot.cz/2013/08/how-to-support-both-python-2-and-3.html
Jan On Thu, 22 May 2014 11:05:43 +0200 Martin Sandve Alnæs <[email protected]> wrote: > The plan for the initial work here is to keep the code python 2.7 > compatible but ready for a later swift switch to 3 only. I suggest we > release fenics 1.5 with python 2.7 compatibility intact but > convertible to python 3 by just running py2to3. Otherwise there will > be too much simultaneous breakage. Then we can discuss whether we > leave python 2.7 behind in fenics 1.6 or not. > > However, I haven't thought about the swig side in dolfin, and as Johan > mentions keeping the Python CAPI code compatible is not covered by > py2to3. I'll discuss this with Johan and Aslak. > > Martin > > > On 22 May 2014 10:49, Garth N. Wells <[email protected]> wrote: > > > Nice. Do we want to support Python 2.7 and 3, or would it be more > > sustainable to go all Python 3? My preference is for simplicity and > > low maintenance, which points to Python 3 only support. > > > > Garth > > On Thu, 22 May, 2014 at 9:39 AM, Martin Sandve Alnæs > > <[email protected]> wrote: > > > >> We have a summer intern at Simula, Aslak Bergersen, > >> who will work on preparations for python 3 support in FEniCS, > >> as well as some other FEniCS tasks, from late June and > >> throughout July. > >> > >> The preparations for python 3 involves mainly: > >> - Replacing ScientificPython for AD in FIAT > >> - Applying and committing backwards compatible parts of py2to3 > >> - Replacing several functions such as dict.iteritems with > >> six.iteritems in UFL and possibly FFC to make sure we keep the > >> same performance and memory behaviour with python 2 and 3. > >> > >> I will be on vacation part of his time here so please > >> help him out if he has questions to the list. > >> > >> Martin > >> > > > > _______________________________________________ fenics mailing list [email protected] http://fenicsproject.org/mailman/listinfo/fenics
