GEXF graph format bugs, issues, and enhancements

[hagberg]

Master list of issues and enhancements for the GEXF format graph files. See https://gephi.org/gexf/format/

"GEXF (Graph Exchange XML Format) is a language for describing complex networks structures, their associated data and dynamics. Started in 2007 at Gephi project by different actors, deeply involved in graph exchange issues, the gexf specifications are mature enough to claim being both extensible and open, and suitable for real specific applications. "

• Exporting dynamic .gexf format Exporting dynamic .gexf format #766

• write_gexf does not handle Nones write_gexf does not handle Nones #1490

• Networkx can not read the attributes from .gexf file Networkx can not read the attributes from .gexf file #2312

• gexf graph read/write converts edge start and end dates attributes to attvalues element .gexf graph read/write converts edge start and end dates attributes to attvalues element #927

• write_gexf saves invalid dynamic graphs write_gexf saves invalid dynamic graphs #3249

• read_gexf does not parse ISO dateTime format read_gexf does not parse ISO dateTime format #3246

• An encoding error dealing with '\0' An encoding error dealing with '\0' #3273

• faithful saving and loading (graphml, gml, gexf) faithful saving and loading (graphml, gml, gexf) #3344

• Missing edge label attribute in GEXFWriter Missing edge label attribute in GEXFWriter #3346

• write_gexf crashes when node-attributes are list write_gexf crashes when node-attributes are list #3572

[csotomon]

write_gexf crashes when node-attributes are list error is because if the object is a list, the iterator search for for a 3 value tuple (value, start date, end date)

networkx/networkx/readwrite/gexf.py

Line 458 in 44e805a

for val, start, end in v:

to create a gexf tag like this:
<attvalue for="2" value="2" start="2009-03-01" end="2009-03-10"/>

I don't know about gexf format, is necessary that the list (array) attributes be declared in dynamic mode?

[dschult]

At the moment, the code only treats list attributes as if they are specifying a dynamic attribute.
The GEXF format does not allow a list attribute.
There may be a way to format your list as a string and then write it that way.