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§ cs 202 · 6 guides

CS 202 — Python Idioms

Decorators, context managers, dataclasses, generators, typing, logging — the idiomatic Python a working engineer writes daily.

Level
6 guides
# Code Name Level Updated
1 —
Context Managers `with` statements, `__enter__` / `__exit__`, and `contextlib` — guaranteed cleanup, the right way.
intermediate
2 —
Dataclasses Boilerplate-free record types — perfect for model configs, training results, and any DTO.
beginner
3 —
Decorators Functions that wrap functions — caching, timing, retries, and the Pythonic way to add cross-cutting behavior.
intermediate
4 —
Iterators and Generators Lazy sequences, `yield`, and why they matter for data pipelines that don't fit in memory.
intermediate
5 —
Logging (and Why `print` Won't Cut It) Levels, handlers, formatters, and structured logging — what production ML services need.
beginner
6 —
Type Hints, Generics, Protocols Static typing in a dynamic language — what mypy and pyright catch, and how to type-check ML code without losing your mind.
intermediate