Can you explain the principles and main ideas of the clean architecture concept in software?

Clean architecture is an approach to software design that divides the system into layers with clear dependencies and responsibilities. The main ideas:

• Layer separation: Business rules (Entities) are at the center, surrounded by Use Cases (interactors), then interfaces (e.g., UI, databases).

• Dependencies point inward: External layers depend on internal ones, but not vice versa. This allows changing the UI or database without affecting business logic.

• Dependency inversion: Internal layers are unaware of the implementation details of external layers; interaction occurs through abstractions (interfaces).

• Testability: Thanks to separation and abstractions, business logic is easy to test independently.

Example: In Python, you can define a repository interface and implement it separately from the business logic that uses this interface, without knowing the details of data storage.