If help is visible in iPython I should see it on PyCharm, right?

I have started using an audio processing library (http://essentia.upf.edu/) with bindings for python. When I use it from iPython I can access all the documentation (docstrings), but PyCharm does not recognize its classes (it recognizes the modules but like if they were empty).

I am using OSX and the library is installed in:
/usr/local/lib/python2.7/site-packages/essentia

In PyCharm, preferences, python interpreters, I have the its path correctly detected:
//usr/local/lib/python2.7/site-packages

And other libraries from the same directory show the documentation properly (e.g. numpy)

Any hint?