Google’s Python Class

Free Python course from Google covering strings, lists, sorting, dicts, files, and regular expressions — practical and concise

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Getting Started
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Google’s Python Class is older than most resources on this list but holds up well — a compact set of written lessons and exercises covering strings, lists, sorting, dictionaries, files, and regular expressions, aimed at people who already know some programming and want a fast, practical run through Python specifically. It skips a lot of the ceremony beginner courses spend time on.

Paired video lectures are also available on YouTube if you prefer watching over reading. For a more from-scratch beginner path with no prior programming assumed, see CS50P instead.

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Python.org Official Documentation

The official Python language documentation and reference — the tutorial, library and language references, and What’s New notes for every release

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CS50P — Introduction to Programming with Python

Harvard’s free Python course — rigorous, project-based, and widely regarded as one of the best introductions to programming with Python

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PyBites

Bite-sized Python exercises and code challenges for building real fluency through deliberate practice

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