What is the decorator pattern and how is it used?

Can you explain what the decorator pattern is?

The decorator pattern is a structural design pattern that allows behavior to be added to individual objects, either statically or dynamically, without affecting the behavior of other objects from the same class.

How is the decorator pattern typically used in programming?

It's commonly used to extend the functionalities of classes in a flexible and reusable way. For example, you can add features like logging, authentication, or data validation to objects without modifying their code.

Can you give me a code example of the decorator pattern?

Sure! In Python, you can use decorators to modify functions. Here's a simple example:

def decorator_function(original_function):
    def wrapper_function():
        print('Wrapper executed before {}'.format(original_function.__name__))
        return original_function()
    return wrapper_function

@decorator_function
def display():
    print('Display function executed')

display()

What are the advantages of using the decorator pattern?

The main advantages include increased flexibility, adherence to the Single Responsibility Principle, and the ability to combine multiple decorators to enhance functionality.