Re: [igraph] Installing python-igraph on a Linux machine

[Tamas Nepusz]

Hi Alessandro,

Can you please check that the versions of the C core and the Python  
interface match with each other and you don't have any leftover igraph  
installation in any other path that might confuse the Python module  
loader? core.so should be in /usr/lib64/python2.5/site-packages/ 
igraph, libigraph.so.* should be in /usr/lib or /usr/local/lib. If the  
C core corresponding to your Python interface is in /usr/lib, make  
sure you don't have any other version in /usr/local/lib, otherwise the  
class loader picks that up first.

The Linux library loader has a debug mode which might be of some use  
to you. It can be activated as follows:

LD_DEBUG=libs python

This launches the Python interpreter with the library loader debug  
mode turned on, so you will see where it loads the libraries from.

--
Tamas

On 2008.10.21., at 17:15, Alessandro Antonucci wrote:

> Dear Igraphers,
>
> I am trying to install igraph and its Python
> extension module on a dual core Linux machine
> (mounting Mandriva 2009).
>
> Both the C library and the Python package
> installations seem to be successfully,
> but when I try to launch a Python script
> (e.g., one of those in the test directory
> of the Python module) I obtain the following
> import error:
>
> > > ImportError: /usr/lib64/python2.5/site-packages/igraph/core.so:
> > > undefined symbol: igraph_shortest_paths_dijkstra
>
> Does anybody has experienced this kind of error?
>
> Any idea about how to solve it?
>
> Best,
>
> Alessandro
>
> P.S.
> I have downloaded the latest sources from
> the igraph website, while I was not able
> to find rpms for my distribution.
>
> --
> --
> ===============================================================
> Alessandro Antonucci
>
> Dalle Molle Institute for Artificial Intelligence (IDSIA)
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>
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