**Polymorphism** is one of the fundamental concepts in object-oriented programming (OOP). It refers to the ability of different classes to share the same attributes and methods while exhibiting different behaviors.

Let's consider an example of polymorphism:

dct = {1: "first", 2: "second", 3: "third"}
string = "Codefinity"
lst = [1, 2, 3, 4, 5]

print(len(dct))  # counts the keys in dictionary
print(len(string))  # counts the symbols in string
print(len(lst))  # counts the elements in list

The `len()` function exhibits different behaviors depending on the type of data it operates on. This example serves as a demonstration of polymorphism in action.

# Polymorphism Implementation
To implement polymorphism, we can create classes that share the same attributes and methods:

class User:
    role = "User"
    
    def info(self, some_value):
        print("This is standart user.", some_value + 100)

class Admin:
    role = "Admin"
    
    def info(self, some_value):
        print("This is admin of this service.", some_value * 100)

class Hacker:
    role = "Hacker"

    def info(self, some_value):
        print("This person can thief your data.", some_value * 0)

user = User()
admin = Admin()
hacker = Hacker()

lst = [user, admin, hacker]

for item in lst:
    print(item.role)
    item.info(33)

> Note
>
> **Polymorphism** in Python refers to the ability of objects to exhibit different behaviors while performing the same actions.

This course covers Object-Oriented Programming (OOP) in Python, starting with the basics and progressing to advanced concepts. You will implement a User model to gain practical experience and understanding of OOP features. By the end of the course, you will have a strong foundation in OOP and a deeper knowledge of Python's inner workings.

Let's start! The Object-Oriented Programming basic concepts are waiting for you here! In this section, you will get acquainted with the most important concepts for understanding Object-Oriented Programming.

Inheritance - the first of the OOP principles. The entities can be inherited from other ones. You learn how it works in code here.

Inheritance - the second of the OOP principles. The attributes and methods can be closed inside the class and used by the class only. Here you learn how to code with different access modifiers.

Polymorphism and abstraction are the third and fourth of the OOP principles. These principles are not easy to understand. Here you will get to know them in the simplest ways.

The magic methods make sandbox from Python. It's a unique Python tool you can't see in other languages. Here you learn how to use these methods and about the flexibility that they bring to Python.

What is Polymorphism?

Polymorphism Implementation

Awesome!

What is Polymorphism?

Polymorphism Implementation