There's a critical gap between the expectations of Ruby/Java programmers of how to write Python and the way Python programmers behave. I think it really is cultural, to an extent. The Java programmers look for Java-style documentation, with classes and methods and lists of exceptional conditions. The Ruby programmers look for Ruby-style documentation, with lots of diversions into the "why" of things and the context, possibly with pictures of foxes.

A Python programmer would consider the Java docs needlessly detailed and the Ruby docs a bit fluffy and not to the point, but after all, it is just a matter of viewpoint, community goals, and culture. There's also the issue of installing packages in Python, which can be a bit of a bummer, but I've never had a problem downloading a Python package from some site and following the directions.