Py

Python

beginner

Life is short. Use Python.

Python is a high-level, dynamically typed language famous for its readable syntax. It powers AI research, web backends, automation scripts, and that one thing your data science friend won't stop talking about.

Data Science / AIWeb BackendsAutomationScriptingScientific Computing
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Setup

Python ships pre-installed on macOS and most Linux distros. Windows users need one extra step — we still accept them.

Bash
# Option 1: Official installer (recommended)
# Visit python.org/downloads, download the latest 3.x installer
# CRITICAL: Check "Add Python to PATH" before clicking Install

# Verify in terminal:
python --version    # or python3 --version

# Option 2: Microsoft Store
# Search "Python 3.12" in the Microsoft Store, click Get

# Option 3: winget
winget install Python.Python.3

Lessons

1
Hello, World!
Every coding journey starts with Hello World. It's tradition, hazing, and a sani…
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2
Variables & Data Types
Python is dynamically typed, which means you don't declare types — Python figure…
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3
Control Flow
Python uses indentation to define code blocks. Not curly braces. Not keywords. W…
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4
Functions
Functions are reusable blocks of code. Write once, call many times. This is the …
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5
Lists, Dicts & Sets
Python's built-in collections are so good you'll rarely need anything else. List…
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6
Modules & Packages
Python's standard library is enormous. And if that's not enough, there's PyPI wi…
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7
Error Handling
Things go wrong. Files don't exist. Users type letters when you expected numbers…
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8
Mini Project: CLI Todo App
Let's build something real: a command-line todo app that saves your tasks to a f…
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9
Classes & OOP
Python classes are simpler than Java or C++ — no access modifiers, no header fil…
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10
File I/O
Python file handling is clean and safe with the "with" statement, which automati…
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11
Comprehensions & Generators
List comprehensions are Pythonic. They are also extremely easy to abuse until yo…
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12
Decorators & Functional Tools
A decorator is just a function that takes a function and returns a function. The…
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13
Type Hints & Modern Python
Python type hints do not make Python a statically typed language — the interpret…
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14
Python Cheatsheet
The whole language on one page — syntax, collections, idioms. Bookmark this.
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