[Bf-committers] Moving to Python 3.2.x

Mon Mar 7 15:43:06 CET 2011

HI, after compiling python 3.2, I have to copy it from /usr/local/lib to
zwei5new/install/linux2/2.56/python/lib
in my home folder. Before i have the same error as Tobias.

Cheers mib

Am 07.03.2011, 15:39 Uhr, schrieb Tobias Oelgarte  
<tobias.oelgarte at googlemail.com>:

> I installed the python 3.2 packages on Ubuntu 10.10 from 11.04. No big
> deal so far. Some dependecies (as written before), but nothing serious.
> In needed to append "mu" in my case and it build with some minor
> warnings (as usual).
>
> But now i'm stuck. Blender fails at the start with the following message:
>
> found bundled python:
> /media/Trekstor_01/temp/blender-build/cmake/bin/2.56/python
> Fatal Python error: Py_Initialize: Unable to get the locale encoding
> LookupError: no codec search functions registered: can't find encoding
> Aborted
>
> Any idea what might be the reason and how to fix it?
>
> Am 07.03.2011 15:34, schrieb Campbell Barton:
>> 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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