Re: [igraph] neighborhood subgraph (python)

[Tamás Nepusz]

> The recent stumbling block is related to 'neighborhood' . Below is what is 
> working for me in R, but doing this same thing in python has been difficult.  
graph.neighborhood in R and Graph.neighborhood in Python are not completely 
equivalent: the R version returns a list of induced subgraphs, while the Python 
version returns the nodes of the subgraph only and leave the construction of 
the induced subgraph up to you. (Note that the R interface also has a function 
named "neighborhood" -- that one is equivalent to Graph.neighborhood in 
Python). So, first you have to construct your induced subgraph explicitly, and 
then calculate the closeness. The final code should look something like this 
(untested, but shows the idea):

result = []
for node in gr0.vs:
    neis = gr0.neighborhood(node.index)
    subgraph = gr0.subgraph(neis)
    result.append(subgraph.closeness())

Cheers,
Tamas