Installing scikit-learn

This book was written for version 0.18.1 of scikit-learn; use this version to ensure that the examples run correctly. If you have previously installed scikit-learn, you can retrieve the version number by executing the following in a notebook or Python interpreter:

# In[1]:
import sklearn 
sklearn.__version__ 

# Out[1]:
'0.18.1'

If you have not previously installed scikit-learn, you may install it from a package manager or build it from source. We will review the installation processes for Ubuntu 16.04, Max OS, and Windows 10 in the following sections, but refer to http://scikit-learn.org/stable/install.html for the latest instructions. The following instructions assume only that you have installed Python >= 2.6 or Python >= 3.3. See http://www.python.org/download/ for instructions on installing Python.