python:architecture

Use the functional core / imperative shell pattern to separate business logic from side effects in Python, isolating pure domain rules from IO operations to enable deterministic testing and maintainable architectures.

The functional core and imperative shell pattern in Python architecture isolates pure business logic in a functional core, while the imperative shell handles side effects and IO, ensuring scalable and maintainable domain models.

Structure a Python service using Domain-Driven Design by defining bounded contexts, explicit domain models, and modular layers including Entities, Repositories, Services, and Adapters for external system integration.

Use clean architecture in Python applications when you need scalable and maintainable systems with clear domain boundaries, a defined persistence strategy, and explicit data transformations across bounded contexts.

This Python architecture approach requires no specific frameworks or dependencies, relying instead on typed data models and standard design patterns to structure layers and enforce explicit data transformations.