Machine Learning in Python

I was looking for info on Stocastic Gradient Decent algorithm and saw this:

Scikit

http://scikit-learn.org/stable/index.html

There is a good 45 min video http://scikit-learn.org/stable/presentations.html (the skit-learn video by Jake Vanderplas) where the url he talks about is wrong I think he means http://www.astroml.org/sklearn_tutorial/

I've since been searching around and found the following that look interesting too:

PyBrain

http://www.pybrain.org

mlpy

http://mlpy.sourceforge.net
Seems pretty extensive

milk

http://pythonhosted.org/milk/

Still early days