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Hand-written tutorials, ordered as a recommended learning path.

1. 81 Generators & yield Understand Python generators from the ground up — how yield turns a function into an iterator, lazy evaluation, generator expressions, and when generators beat lists. 5 min read →
2. 82 List Comprehensions Go beyond the basics of Python list comprehensions — filtering, nested loops, conditional expressions, dict and set comprehensions, and when a plain for loop is the better choice. 5 min read →
3. 83 Type Hints A practical introduction to Python type hints — basic syntax, common collection types, Optional and Union, type-checking with mypy, and how hints improve code without changing runtime behaviour. 5 min read →
4. 84 Virtual Environments Stop polluting your system Python — a practical guide to virtual environments with venv, activating and deactivating them, requirements.txt, and a quick look at modern alternatives. 5 min read →
5. 85 asyncio Basics A practical introduction to Python asyncio: the event loop, async/await, asyncio.run, gather, create_task, and when to pick async over threads. 6 min read →
6. 86 Regex Basics A practical introduction to Python regex with the re module: match, search, findall, sub, groups, named groups, raw strings, and compiling patterns for speed. 6 min read →
7. 87 Threads vs Processes Understand the Python GIL and pick the right concurrency tool: when threads help with I/O, when processes help with CPU, and how to use concurrent.futures. 7 min read →