Scikit-learn

This is the main library for traditional machine learning in the Python ecosystem. It offers a consistent and simple API not only to build Machine Learning models but for doing many related tasks such as data pre-processing, transformations, and hyperparameter tuning. It is built on top of NumPy, SciPy, and matplotlib (another reason to know the basics of these libraries) and it is one of the community's favorite tools for doing predictive analytics. We will learn more about this library in Chapter 5, Predicting Categories with Machine Learning, and Chapter 6, Introducing Neural Nets for Predictive Analytics.