Python: Fundamentals and the Python 2 to 3 upgrade

A free study guide on Python with 19 lessons you can study step by step.

What you will learn

Part 1 · Python basics

• Running Python: indentation, comments and print
• Variables, dynamic typing and numbers
• Strings: f-strings, slicing and methods
• Operators, truthiness and the == versus is trap
• Decisions and loops: if, for, while, enumerate and zip

Part 2 · Data structures and functions

• Lists: ordered, changeable and shared
• Tuples and dictionaries
• Sets and comprehensions
• Functions: arguments, defaults and the mutable default trap
• Scope, closures and lambda

Part 3 · Objects and errors

• Classes, objects and self
• Special methods: __repr__, __eq__ and friends
• Inheritance, super() and duck typing
• Exceptions: try, except, else, finally and raise
• Dataclasses: classes without the boilerplate

Part 4 · Files, modules and packages

• Reading and writing files with with and pathlib
• Working with JSON and CSV
• Modules, imports and the __main__ guard
• Virtual environments and pip

All tutorials · Practice quizzes