Python Fundamentals

Learn Python from your very first print() to building a complete game. Every session explains one idea with everyday examples (delivery trucks, photo albums, the annachi kadai down the street), shows real code with its real output, and ends with hands-on tasks with solutions you can reveal when you’re stuck.

Note

Free for everyone. No sign-up needed to read. Sign in to save your quiz scores, flashcard progress and notes.

How to use this course

1. Install Python 3 from python.org (tick Add Python to PATH on Windows), or use Google Colab in the browser with nothing to install.

2. Type the examples yourself. Don’t copy-paste. Typing is how your fingers learn Python.

3. Do the tasks at the end of each session before opening a solution.

4. Take the quiz and flashcards linked at the bottom of each session.

Each session is based on a post from the Parottasalna blog, linked at the top of the page.

Part	Sessions
1 · First steps	print(), variables and data types, how variables really work
2 · Making decisions	operators, conditions and input(), functions
3 · Collections	indexing and slicing, lists, tuples, dictionaries, sets
4 · Going further	generators, and a complete project: the number guessing game

Part 1 · First steps

• Session 1 · The print() function
• Session 2 · Variables, constants and data types
• Session 3 · A variable is a name, not a box

Part 2 · Making decisions

• Session 4 · Operators, conditions and input()
• Session 5 · Functions

Part 3 · Collections

• Session 6 · Indexing and slicing
• Session 7 · Lists: the delivery man’s busy day
• Session 8 · Tuples: the magic photo album
• Session 9 · Dictionaries: Annachi Kadai
• Session 10 · Sets: the rose garden and the botanical garden

Part 4 · Going further

• Session 11 · Generators: the lazy workers of Python
• Session 12 · Project: the number guessing game