This package has some dependencies that do not support Python 3 yet.
They need to be ported first.
Take a look at the list, and choose one.
(Note that there might be false positives; if you spot one, please
file a bug)
The package depends on both Python versions as some Python 3 support
was introduced in 3.2.0 relese. However the package still has Python 2
dependencies and full Python 3 support was not provided yet.