Introduction to Computational Thinking and Data Science (MIT)

Learn Python fundamentals through hands-on projects. Covers variables, functions, loops, data structures, OOP, and algorithms. Earn a free verified certificate upon completion of 5 projects.

Harvard's introduction to programming using Python. Covers functions, variables, conditionals, loops, exceptions, libraries, unit tests, file I/O, and regular expressions.

Codecademy's interactive Python course teaches you the basics from scratch. Write and run code in your browser, learn syntax, functions, control flow, lists, loops, and more.