Re: [igraph] how to translate from R to Python...

[Tamas Nepusz]

> I am a newbie to Python... can you give me an hint on how to  
> translate this R code:
>
> g2 <- subgraph(g, V(g) [ adj(E(g) [ color=="green" ]) ])
It's a little bit complicated since adj() is an R-specific extension  
to igraph. It takes an edge sequence and returns a boolean vector that  
is true for vertices that are adjacent to at least one of the edges.  
Something similar in Python can be implemented as a separate method:


def adj(es):
    result = set()
    for e in es: result.add(*e.tuple)
    return list(result)

g2 = g.subgraph(adj(g.es.select(color="green")))

--
Tamas