Python Packaging Patterns Structure Python projects for reliable distribution and dependency management. Project Layout The Layout (Recommended) Why src layout: Prevents accidental imports from the working directory. Forces installation before testing, catching packaging errors early. Flat Layout (Simple Projects) Acceptable for internal tools and single-organ repos where distribution is not a concern. pyproject.toml Configuration Minimal Configuration Build Backend Selection | Backend | When to Use | |---------|-------------| | hatchling | Default choice. Fast, minimal config, good monorepo…