Python igraph: removing vertices from a graph

Question

I am working with an enron email dataset and I am trying to delete email addresses that do not have "@ enron.com" (i.e. I would like to have only email emails). When I tried to delete these addresses without @ enron.com, some letters were simply missed for some reason. Below is a small graph where the vertices are the email address. This is the gml format:

Creator "igraph version 0.7 Sun Mar 29 20:15:45 2015" Version 1 graph [ directed 1 node [ id 0 label " [e-mail] " ] node [ id 1 label " [e-mail] " ] node [ id 2 label " [e-mail] " ] node [ id 3 label " [e-mail] " ] node [ id 4 label " [e-mail] " ] node [ id 5 label " [e-mail] " ] node [ id 6 label " [e-mail] " ] node [ id 7 label " [e-mail] " ] node [ id 8 label " [e-mail] " ] node [ id 9 label " [e-mail] " ] edge [ source 5 target 5 weight 1 ] ] 

My code is:

 G = ig.read("enron_email_filtered.gml") for v in G.vs: print v['label'] if '@enron.com' not in v['label']: G.delete_vertices(v.index) print 'Deleted' 

In this dataset, you must delete 7 emails. However, based on the code above, only 5 emails are deleted.

Answer 1

From the tutorial here you can access all the vertices with a specific property, and then delete them in bulk as follows:

 to_delete_ids = [v.index for v in G.vs if '@enron.com' not in v['label']] G.delete_vertices(to_delete_ids) 

Here is the result I got:

 to delete ids: [1, 3, 4, 5, 7, 8, 9] Before deletion: IGRAPH DW- 10 1 -- + attr: id (v), label (v), weight (e) + edges: 5->5 After deletion: IGRAPH DW- 3 0 -- + attr: id (v), label (v), weight (e) label: [e-mail] label: [e-mail] label: [e-mail]