python-project-structure

Use a flat directory layout with src/your_package and tests/ to structure your Python project for scalable code. This approach enforces explicit public interfaces and modular design for long-term maintainability.

Define a public API in Python by assigning names to the __all__ variable in __init__.py. This explicitly declares exported modules and functions, hiding internal implementation details and maintaining a clear package interface.

Reorganize existing Python code by grouping related modules into a flat directory layout under src/. Focus on module cohesion and define explicit interfaces using __all__ to clarify boundaries during the refactoring process.

Place tests in a dedicated tests/ directory at the root of your Python project structure. This flat layout keeps testing separate from application logic while maintaining straightforward import paths to source modules.

Yes, a flat directory layout works well for designing Python library packages. It enforces modular design and uses explicit __all__ exports to define the public API, ensuring the library remains scalable and maintainable.

Use __all__ in Python when setting up new projects, reorganizing code, or designing library packages. It enforces an explicit public interface, preventing unintended internal module access and ensuring a scalable architecture.