[Bf-committers] Moving to Python 3.2.x

Martin Poirier theeth at yahoo.com
Mon Mar 7 17:22:05 CET 2011 

Why is it even required for us to move to Py 3.2 for Blender 2.57?

What's the external module support for 3.2 like? Less than 3.1?

I'm not saying we should support both versions, I'm just questioning the sudden move to 3.2 (was it discussed in meeting? it wasn't in the minutes).

Martin

--- On Mon, 3/7/11, Campbell Barton <ideasman42 at gmail.com> wrote:

> From: Campbell Barton <ideasman42 at gmail.com>
> Subject: Re: [Bf-committers] Moving to Python 3.2.x
> To: "bf-blender developers" <bf-committers at blender.org>
> Received: Monday, March 7, 2011, 9:34 AM
> Reasons to move to 3.2 sooner then
> later:
> *note* with the original switch to py3.1 we agreed to
> bundle a single
> python rather then supporting multiple versions of python,
> Win and OSX
> are on 3.2 now.
> - maintaining multiple python versions is (a little)
> overhead for me
> (some function / macro's are new in 3.2).
> - more importantly its a hassle for bug reports, have to
> ask which
> version of py a user has and rule it out as a cause of
> python bugs,
> have 3.1 building locally to check.
> - py3.1 has a some filepath bugs users ran into,
> calculating relative
> paths didn't work right. Though most of these problems were
> on
> windows.
> - we're aiming to release 2.57 end of March so leaving the
> switch too
> late means we get less time to test
> scripts/c-api/build-systems/install are ok
> 
> If we waited until distributions have stable packages this
> could be
> until the next release cycle (months?), waiting another
> week or so
> won't make a big difference.
> 
> This is also not a problem for Win and OSX, Linux has the
> advantage
> that we don't need a pre-compiled lib/ dir but every so
> often them
> also means dealing with version annoyances like this which
> is a trade
> off, though a pre-compiled dir wouldn't work well Linux
> anyway with
> glibc versions... etc.
> 
> And it's simple to build python in Linux, 1 line copy paste
> :)
> 
> wget http://www.python.org/ftp/python/3.2/Python-3.2.tar.bz2
> ; tar
> -jxpf Python-3.2.tar.bz2 ; cd Python-3.2 ; ./configure
> --prefix=$HOME/py32 ; make ; make install
> 
> @Tobias, no need to make a mess out of your system, just
> install to a
> local path, see above --prefix=...
> 
> On Mon, Mar 7, 2011 at 2:20 PM, Tobias Oelgarte
> <tobias.oelgarte at googlemail.com>
> wrote:
> > To make the list complete, also:
> >
> > * python3.2-dev
> > * libpython3.2
> >
> > Am 07.03.2011 15:03, schrieb Tobias Oelgarte:
> >> You will need to install the following packages
> from natty, otherwise
> >> the dependencies are not fulfilled:
> >>
> >> * python3.2
> >> * python3.2-minimal
> >> * libdb5.1
> >> * libsqlite3-0
> >>
> >> They might change in future, so it can happen that
> you will need to
> >> install even more dependencies.
> >>
> >> Am 07.03.2011 14:57, schrieb Tobias Kummer:
> >>> Tobias, try https://launchpad.net/ubuntu/+source/python3.2/3.2-1,
> there
> >>> is a "Builds" section on the right where you
> can d/l python for your
> >>> architecture (i386/x64 etc).
> >>>
> >>> On 03/07/2011 02:43 PM, Tobias Oelgarte
> wrote:
> >>>> That may work for Fedora. But i could not
> find any packages for Ubuntu
> >>>> 10.10 so far. So i will need to compile
> python on my own and make a
> >>>> mess
> >>>> out of my system again...
> >>>>
> >>>> Am 07.03.2011 14:30, schrieb Tobias
> Kummer:
> >>>>> I'm on Fedora 14. A quick "sudo yum
> update python3
> >>>>> --enablerepo=rawhide"
> >>>>> updated my python to 3.2. Then just
> had to add SUFFIX = "mu" in my
> >>>>> user-config.py. Pretty hacky
> transition for now, but it works without
> >>>>> having to compile Py3.2 for yourself.
> I think most Linux distros have
> >>>>> 3.2 in their development repository,
> so enabling it for updating
> >>>>> Python
> >>>>> should fix it.
> >>>>>
> >>>>> Greets!
> >>>>>
> >>>>> On 03/07/2011 02:21 PM, Tobias
> Oelgarte wrote:
> >>>>>> I have the same problem. Ubuntu
> 10.10 is still at 2.6.6 as the
> >>>>>> default.
> >>>>>> It has 3.1 as the alternative. But
> why should we now need 3.2 in a
> >>>>>> rush.
> >>>>>> This makes things only complicated
> for users that don't want to
> >>>>>> compile
> >>>>>> anything on their own.
> >>>>>>
> >>>>>> Am 07.03.2011 14:16, schrieb rsaavedra at ono.com:
> >>>>>>> Hi,
> >>>>>>>      I compile blender once
> o twice a week, but today I got this
> >>>>>>> error:
> >>>>>>>
> >>>>>>> #error "Python versions below
> 3.1 are not supported anymore,
> >>>>>>> you'll need to update your
> python."
> >>>>>>>
> >>>>>>>      That keep me wondering
> what the
> >>>>>>> problem was, until I realized
> that in
> >>>>>>>
> blender/python/intern/bpy_util.h
> >>>>>>> there was this check:
> >>>>>>>
> >>>>>>> #if PY_VERSION_HEX<    
> 0x03020000
> >>>>>>> #error "Python
> >>>>>>> versions below 3.1 are not
> supported anymore, you'll need to update
> >>>>>>> your python."
> >>>>>>> #endif
> >>>>>>>
> >>>>>>>      Please, someone fix
> the message :)
> >>>>>>>
> >>>>>>>      By the
> >>>>>>> way, I downloaded and compiled
> python 3.2 and then I had to put
> >>>>>>> BF_PYTHON_VERSION = '3.2m' in
> user-config.py .
> >>>>>>>
> >>>>>>>      After that it
> >>>>>>> copiled without problems and
> runned. I haven't tested blender yet to
> >>>>>>> find if this  breaks
> anything.
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> ----Mensaje original----
> >>>>>>> De:
> >>>>>>> ideasman42 at gmail.com
> >>>>>>> Fecha: 07/03/2011 12:35
> >>>>>>> Para: "bf-blender
> >>>>>>> developers"<bf-committers at blender.org>
> >>>>>>> Asunto: [Bf-committers]
> Moving
> >>>>>>> to Python 3.2.x
> >>>>>>>
> >>>>>>> Now we have Mac&  
>  Windows building with python 3.1 we
> >>>>>>> can drop support
> >>>>>>> for all OS's.
> >>>>>>> For Linux this probably means
> you'll
> >>>>>>> need to build your own since
> few
> >>>>>>> distributions support py3.2
> yet.
> >>>>>>>
> >>>>>>> I've
> >>>>>>> updated the instructions for
> building python here.
> >>>>>>> http://wiki.blender.
> >>>>>>>
> org/index.php/Dev:2.5/Doc/Building_Blender/Linux/Troubleshooting#Python
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> note, since our wiki update
> the syntax highlighting has gone a
> >>>>>>> strange
> >>>>>>>
> >>>>>>> (since moving servers) so some
> text is easier to read when selected.
> >>>>>>>
> >>>>>>>
> >>>>>>> One gotcha with 3,.2 is that
> python now has a suffix which
> >>>>>>> depends on
> >>>>>>>
> >>>>>>> build-options so you may have
> libpython32mu.so or libpython32d.so,
> >>>>>>>
> >>>>>>> where before it was simply
> libpython32.so.
> >>>>>>>
> >>>>>>>>    From ./configure.in
> >>>>>>>     * --
> >>>>>>> with-pydebug (adds a 'd')
> >>>>>>>     * --with-pymalloc (adds
> a 'm')
> >>>>>>>     * --with-
> >>>>>>> wide-unicode (adds a 'u')
> >>>>>>>
> >>>>>>> This means getting the path to
> includes&
> >>>>>>> libs isn't so simple
> >>>>>>> anymore, for linux it may be
> best to search for
> >>>>>>> all possibly
> >>>>>>> combinations of d/m/u to
> detect the python version, but
> >>>>>>> for now these
> >>>>>>> need to be set manually.
> >>>>>>>
> >>>>>>
> _______________________________________________
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> >>>>>> http://lists.blender.org/mailman/listinfo/bf-committers
> >>>>>>
> >>>>>
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> >>>>>
> >>>>
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> >>>
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> >>
> >
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> 
> 
> 
> -- 
> - Campbell
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