Design Patterns in Python

Simplified and easy to understand design pattern principles

Single Responsibility Principle

The first design principle is: Single Responsibility Principle(SRP)

Another term connected with the SRP is Separation of Concern(SOC). Both are one and the same thing.

This pattern/class signifies a pattern which is meant to do one thing only and should not focus on another tasks.

Open-Closed Principle

The second design principle is: Open-Closed Principle(OCP)

This principle states that when you add a new functionality, add it via an extension, and not via modification. i.e. open for extension, closed for modification.

To counter this, we have an Enterprise patter: Specification Pattern

Liskov Substitution Principle

The third design principle is: Liskov Substitution Principle(LSP)

This is one of a solid design principle named after Barbara Liskov

It states that if you have a base class, you should be able to derive other classes from it.

Interface Segregation Principle

The fourth design principle is: Interface Segregation Principle(LSP)

It states that you don't insert too many methods or elements into an interface YAGNI