Hi Yannis, As the error message states, that is happening within your code at line 459. It isn't going down to graph_tool or graphviz. And it is a python NameError for 'label', so you're simply using a name 'label' that is not defined. You can't define a dictionary using as argument something that is not defined. In this case it is your dictionary definition that should have quoted the name so it becomes a string. Try this instead: graphviz_draw(g, vcolor=typev, vprops={"label": labelv}, eprops={"label": labele}, output=fname+".pdf") Good luck, ale On Thu, Oct 15, 2015 at 8:46 AM, Yannis Haralambous <yannis1962@gmail.com> wrote:

Sorry for disturbing again, but I’m trying to draw a graph (with graphviz) with labels on vertices and on edges. I saw in the documentation that vprops and eprops are Python attributes with values that are dictionaries containing key-value pairs, where key is a graphviz attribute and value is either a string or a property map.

So I tried the following:

*graphviz_draw(g, vcolor=typev, vprops={label: labelv}, eprops={label: labele}, output=fname+".pdf »)*

where label is a graphviz property (as explained in http://www.graphviz.org/doc/info/attrs.html#d:label) and labelv and labele are property maps defined as

*labelv = g.new_vertex_property("string")labele = g.new_edge_property("string »)*

This doesn’t work and I get the error message

*Traceback (most recent call last):* * File "build-graph.py", line 459, in <module>* * graphviz_draw(g, vcolor=typev, vprops={label: labelv}, eprops={label: labele}, output=fname+".pdf")* *NameError: name 'label' is not defined*

But label is indeed a graphviz property, no doubt upon that. What am I doing wrong?

Thanks in advance

Yannis

-- ------------------------------------------------------- Yannis Haralambous Professor Institut Mines-Télécom, Télécom Bretagne Computer Science Department UMR CNRS 6285 Lab-STICC Technopôle Brest Iroise CS 83818, 29238 Brest Cedex 3, France Email: yannis.haralambous@telecom-bretagne.eu Internet: http://perso.telecom-bretagne.eu/yannisharalambous/ <http://omega.enstb.org/yannis> ICBM address: 48°21'31.57"N 4°34'16.76"W Twitter: y_haralambous ------------------------------------------------------- ...the ball I threw while playing in the park has not yet reached the ground (Dylan Thomas)

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