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CS50's Introduction to Programming with Python

Harvard CS50’s free Python programming course covers functions, conditionals, loops, exceptions, libraries, testing, files, regular expressions and object-oriented programming.

Visit official website Last checked Aug 14, 2026

What is free?

CS50’s Introduction to Programming with Python can be studied free through Harvard’s CS50 OpenCourseWare. The material covers core Python programming concepts and includes problem sets and a final project. Learners who meet the course requirements can also receive a free CS50 Certificate.

What are the limitations?

Receiving the free certificate requires completing the assessed work rather than only watching the lectures. The free CS50 Certificate is different from the optional verified edX certificate. Learners should therefore distinguish free course completion from a paid third-party verified credential.

Who is it best for?

Beginners who want a structured university-level introduction to Python with substantial exercises and the possibility of earning a free completion certificate.

Muft verdict

One of the strongest free programming courses available because both the complete course and the CS50 completion certificate can be earned without paying. The workload is considerably more serious than a short tutorial.