dolfin team mailing list archive

["Åsmund Ødegård" <aasmund@xxxxxxxxx>]

On 9/18/07, LUK ShunTim <shuntim.luk@xxxxxxxxxxxx> wrote:
>
> Anders Logg wrote:
> > Garth N. Wells wrote:
> >>
> >> Lorenzo Isella wrote:
> >>> Hi Anders,
> >>> And thanks for your help.
> >>> I suspect my problem is rather trivial and with some more adequate
> >>> computer skills I could fix it myself.
> >>> This is the content of the directory you mentioned:
> >>>
> >>> ~/temp$ ls /usr/lib/python2.5/site-packages/dolfin/
> >>> assemble.py   constants.pyc  dolfin.py
> _dolfin.so.0      __init__.pyc
> >>> assemble.pyc  _dolfin.a      dolfin.pyc  _dolfin.so.0.0.0  plot.py
> >>> constants.py  _dolfin.la     _dolfin.so  __init__.py       plot.pyc
> >>>
> >>> However, see what happens when I fire up python2.5 and try importing
> >>> dolfin:
> >>>
> >>> ~/temp$ python2.5
> >>> Python 2.5.1 (r251:54863, Aug 17 2007, 00:51:07)
> >>> [GCC 4.1.3 20070812 (prerelease) (Debian 4.1.2-15)] on linux2
> >>> Type "help", "copyright", "credits" or "license" for more information.
> >>>>>> import dolfin
> >>> Traceback (most recent call last):
> >>>   File "<stdin>", line 1, in <module>
> >>>   File "/usr/lib/python2.5/site-packages/dolfin/__init__.py", line 4,
> >>> in <module>
> >>>     from assemble import *
> >>>   File "/usr/lib/python2.5/site-packages/dolfin/assemble.py", line 16,
> >>> in <module>
> >>>     from ffc import *
> >>> ImportError: No module named ffc
> >>>
> >>> So I see and error message because ffc is missing. But that is really
> >>> odd as my system sees it as installed.
> >>> In fact, I can easily import ffc, but under python 2.4 (which seems to
> >>> be the default on my box).
> >>> See:
> >>>
> >>> ~/temp$ python
> >>> Python 2.4.4 (#2, Aug 16 2007, 02:03:40)
> >>> [GCC 4.1.3 20070812 (prerelease) (Debian 4.1.2-15)] on linux2
> >>> Type "help", "copyright", "credits" or "license" for more information.
> >>>>>> import ffc
> >>> and no error message is given. It seems to me that dolfin wants to run
> >>> under python2.5 and ffc asks for 2.4.
> >>> How can I fix that? Everything is already there!
> >> If you install both packages with the default Python version, things
> >> should work out. To force FFC to use Python 2.5, in the FFC directory
> do
> >>
> >>   python2.5 setup.py install
> >>
> >> Make sure that you do the same for FIAT.
> >>
> >> Garth
> >
> > I think he installed from the Debian packages so this won't help?
> >
> > /Anders
>
> Hello,
>
> This is related to the problem that I encountered when trying to build
> syfi from the deb-src in debian/sid. If you install the packages from
> the fenics repository in debian, *not* ubuntu, libdolfin-dev gets
> installed under /usr/lib/python2.5/... but ffc etc are installed under
> the *default* python library tree, which is python 2.4 as far as debian
> is concerned.
>
> My suggestion is to package them with an explicit dependency on python
> 2.5 so that it can also play nice with debian.



Sorry for the inconvenience.

For some reason that scripts developed to build the packages use
python2.5explicitly for syfi, while ffc just use the default, which as
you say is
python2.4 on debian. On ubuntu feisty it is python2.5, which is probably the
reason we haven't recognized this.

I'll look into this as soon as possible, probably tonight.



best regards,
-- 
[simula.research laboratory]
                 Åsmund Ødegård
                 IT-Manager
                 phone: +4790069915
                 http://www.simula.no/