This is a simple test of using scikit-learn on treeherder data. To try it out, install scikit-learn (and its dependencies) in a virtualenv, then run:
# extract test data
tar jxf training.tar.bz2
tar jxf testing.tar.bz2
python classify-and-test.py
You should get a bunch of output as the script creates a classifier based on the training data and attempts to use it on the test set of data.