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Re: [igraph] Python Read_GraphML---Assertion Failed

From: Tamás Nepusz
Subject: Re: [igraph] Python Read_GraphML---Assertion Failed
Date: Wed, 22 Jan 2014 01:56:10 +0100


I’m receiving a different error; igraph complains about an unknown attribute 
type, but since we have made a few updates in the GraphML parser, it could be 
the case that both error messages (yours and mine) are caused by the same issue.

I took a quick look at the GraphML file and it seems like the problem is caused 
by the “vector_string”, “vector_long” and “vector_float” attribute types; these 
are not valid GraphML attribute types and are not supported by igraph. 
Replacing these with “string” seems to fix the problem.  


On Wednesday, 22 January 2014 at 00:45, Bradford Boyle wrote:

> I'm trying to read in a GraphML file containing the stongly connected
> component of the PGP network of trust [1]. When I load the file
> g = Graph.Read_GraphML("pgp.xml")
> I get the following error
> python: igraph_strvector.c:467: igraph_strvector_size: Assertion
> `sv->data != 0' failed.
> I am not really sure how to go about determining if this is an issue
> with the GraphML file or an issue with the library; I have a core file
> and can provide a stack trace.
> I am running Ubuntu 13.04 with libigraph 0.6.5-4~ubuntu13.04.1 and
> python-igraph 0.6.5-4.
> [1]: http://graph-tool.skewed.de/static/performance/pgp.xml.gz
> Bradford
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> igraph-help mailing list
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