Effective Python

Write idiomatic, type-safe Python 3.14+ code following established best practices.

Core Principles

1. Strict typing by default - All code uses type annotations
2. Explicit over implicit - Clear, readable code
3. Composition over inheritance - Prefer simple, composable designs
4. Fail fast - Raise exceptions early, use assertions

Typing (Always Apply)

from __future__ import annotations  # Always include for forward references
from typing import TypeVar, Generic, Protocol, Self, override
from collections.abc import Callable, Iterator, Sequence, Mapping