## About an OOP

**OOP** or **O**bject **O**riented **P**rogramming is a programming paradigm with the idea of a specific program organization when the programmer manipulates objects in the code.

OOP has such main **principles**:
  - Inheritance;
  - Encapsulation;
  - Polymorphism.


## Class
Class is like a custom data type or structure but allows you to keep more complex data. 

Imagine your project requires **cats** representation. What do you know about them? 


They have stable hair color, eyes color, a number of legs, for example. You can measure the cat's weight and the length of the tail. A cat can move and sleep, cry and eat, and give birth to another cat.

All these features can be interpreted and used in the class `Cat`.

The object-oriented paradigm allows developers to create and structure programs using objects with predefined behavior. This is a widely used style of software organization that is easy for the development team to understand. Like most other programming languages, Python supports and implements this paradigm.

The first step is to understand the key statements. Classes, objects, attributes, methods...

Encapsulation provides access to the methods and attributes of the class.

Inheritance's main idea is to use already defined classes and produce new ones by improving and extending some other classes.

This OOP principle allows the user to change the parent class functionality and adapt it to the children's class.