The four most-important Python libraries are NumPy, Pandas, Matplotlib, and Scikit-learn.

Learn Python data science libraries

1. NumPy2. pandas3. Matplotlib4. Scikit-learn

NumPy

A library that makes a variety of mathematical and statistical operations easier; it is also the basis for many features of the pandas library.

Pandas

A Python library created specifically to facilitate working with data. This is the bread and butter of a lot of Python data science work.

Matplotlib

A visualization library that makes it quick and easy to generate charts from your data.

Scikit-learn

The most popular library for machine learning work in Python.

NumPy and Pandas are great for exploring and playing with data. Matplotlib is a data visualization library that makes graphs as you’d find in Excel or Google Sheets.