[igraph] Python - indexing Graph object using pair of vertex indices doesn't work

[cedric . simillion]

Hi there!

I just started using the Python igraph module. The online documentation says: "When a graph is indexed by a pair of vertex indices or names, the graph itself is treated as an adjacency matrix and the corresponding cell of the matrix is returned"

Unfortunately, when I try this out, I get an error:

>>> from igraph import *

>>> net = Graph.Erdos_Renyi(100, p = 0.05, directed=True)

>>> net[1,2]

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

KeyError: 'Attribute does not exist'

Is this a bug or is something wrong? I'm using Python 2.7.3 on Ubuntu Linux 12.10 64-bit. I've installed igraph from the standard package repository.

All help is appreciated.

Best,

Cedric