Re: [igraph] undefined symbol: xmlStrEqual when import igraph.Graph

[Tamas Nepusz]

Hi,

Please try this:

$ ldd /home/ubuntu/djangoproject/env/lib/python3.5/site-packages/igraph/_igraph*.so

This should tell you which libraries _igraph.so is trying to link to; in my case, it includes a line like this:

libxml2.so.2 => /usr/lib/x86_64-linux-gnu/libxml2.so.2

If you have a line like the one above, check the .so file that it refers to and verify that it exists and is not a dangling symlink.

T.

On Mon, Jan 23, 2017 at 11:21 AM, Andrew O'Harney <address@hidden> wrote:

From fresh the commands were:

virtualenv -p python3

source env/bin/activate

pip install python-igraph==0.7.1.post6

On 23 January 2017 at 10:17, Tamas Nepusz <address@hidden> wrote:

How did you install the Python interface for igraph? Is this a pre-compiled package that you have downloaded from somewhere, or did you compile the Python interface on your own? It could be the case that the Python interface is trying to link to a different version of libxml2 than the one on your system.

T.

On Mon, Jan 23, 2017 at 11:15 AM, Andrew O'Harney <address@hidden> wrote:

I believe it is.

apt-get install libxml2 gives:

libxml2 is already the newest version (2.9.3+dfsg1-1ubuntu0.1).

On 23 January 2017 at 10:10, Gábor Csárdi <address@hidden> wrote:

I think the libxml2 package is not installed on your system.

G.

On Mon, Jan 23, 2017 at 10:09 AM, Andrew O'Harney <address@hidden> wrote:

I am trying to import igraph.Graph in python 3.5.0 on Ubuntu 16.04.1 LT however get the following error:

from igraph._igraph import *

ImportError: /home/ubuntu/djangoproject/env/lib/python3.5/site-packages/igraph/_igraph.cpython-35m-x86_64-linux-gnu.so: undefined symbol: xmlStrEqual

I am using a virtualenv and the requirement is python-igraph==0.7.1.post6

Does anyone have an idea how this can be resolved?

Thanks,

Andy

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