Code Structure

Welcome to the Python code structure guide. This section focuses on practical habits that make Python code easier to read, test, organize, and evolve over time.

Code structure

Work through these topics in order to learn how to organize modules, separate concerns, and make interfaces clearer.

Small, Focused Modules

Separate Configuration

Separate Logic from I/O

Run Code Only in Main

Type Hints for Interfaces

Dataclasses for Data

Composition vs Inheritance

Pathlib for File Paths