Hi,

Please open an issue in the website with this example, and I'll take a look at it when time permits.

Best, Tiago

Am 11.11.20 um 15:32 schrieb Rolf Sander:

Hello,

After updating graph_tool from version 2.33 to 2.35, I cannot make plots with graphviz_draw() anymore. Here is a minimal example to reproduce the error:

################################# import graph_tool.all as gt g = gt.Graph() v0 = g.add_vertex() v1 = g.add_vertex() e01 = g.add_edge(v0,v1) g_dict = {'layout':'neato'} gt.graphviz_draw(g, gprops=g_dict) #################################

The error message is:

################################# Error: Layout type: "n" not recognized. Use one of: circo dot fdp neato        nop nop1 nop2 osage patchwork sfdp twopi Error: Layout was not done Segmentation fault #################################

I suspect that somewhere the string 'neato' is converted to a single character 'n'. In my real code, I also get several warning messages quoting only the first character of miscellaneous strings.

I have python3-graph-tool installed on my computer which runs on Linux Mint 19.2 Tina (based on Ubuntu 18.04 LTS, bionic). My graphviz version is 2.40.1.

Can anyone reproduce this?

Best regards Rolf

For anyone who has the same problem, here is a quick bug fix until the problem is finally resolved:

In your graph-tool-2.35 code, replace the file graph_tool/draw/graphviz_draw.py by this one:

http://www.rolf-sander.net/tmp/graphviz_draw.py

FYI: This replacement file graphviz_draw.py is taken from graph-tool version 2.33, and a bug fix from Jeff Trull has already been applied, see:

https://nabble.skewed.de/graphviz-draw-cannot-plot-loops-anymore-td4028466.h...

-- Sent from: https://nabble.skewed.de/