Expert Python Programming - Third Edition

Using function annotations and abstract base classes

Design patterns are meant to make problem-solving easier, and not to provide you with more layers of complexity. The zope.interface is a great concept and may greatly fit some projects, but it is not a silver bullet. By using it, you may shortly find yourself spending more time on fixing issues with incompatible interfaces for third-party classes and providing never-ending layers of adapters instead of writing the actual implementation. If you feel that way, then this is a sign that something went wrong. Fortunately, Python supports for building a lightweight alternative to the interfaces. It's not a full-fledged solution such as zope.interface or its alternatives, but generally provides ...