Python: Master the Art of Design Patterns

Object-oriented design principles

Now, let's talk about another set of concepts that are going to be crucial for us. These are nothing but the object-oriented design principles that will act as a toolbox for us while learning design patterns in detail.

The open/close principle

The open/close principle states that classes or objects and methods should be open for extension but closed for modifications.

What this means in simple language is, when you develop your software application, make sure that you write your classes or modules in a generic way so that whenever you feel the need to extend the behavior of the class or object, then you shouldn't have to change the class itself. Rather, a simple extension of the class should help you build the new ...