[igraph] python-igraph 0.5.2 error on Ubuntu 9.04

[Domenico Conti]

Hello, I tried to install igraph python-0.5.2 on ubuntu 9.04 but when I 
type python at the prompt: import igraph earning the following result:

>>> import igraph
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/usr/lib/python2.6/dist-packages/igraph/__init__.py", line 30, 
in <module>
   from igraph.core import *
 File "/usr/lib/python2.6/dist-packages/igraph/igraph/__init__.py", 
line 48, in <module>
   class Graph(core.GraphBase):
NameError: name 'core' is not defined

Successivamente, dovrei usare python-igraph in java. E' possbile farlo?