What are Python decorators and how do they contribute to code modularity and reusability? Provide an example to illustrate their usage.

 Q12: What are Python decorators and how do they contribute to code modularity and reusability? Provide an example to illustrate their usage.

A12:

• Python Decorators:

  • Decorators in Python are functions that are used to modify or extend the behavior of other functions or methods. They provide a way to wrap a function with additional functionality, enhancing code modularity and reusability.

• Code Modularity and Reusability:

• Decorators allow developers to separate concerns and apply reusable behavior to multiple functions without modifying their code directly. This promotes cleaner code, as common functionality can be abstracted into decorators.

# Example of a simple decorator

def my_decorator(func):

    def wrapper():

        print("Something is happening before the function is called.")

        func()

        print("Something is happening after the function is called.")

    return wrapper

@my_decorator

def say_hello():

    print("Hello!")

# Calling the decorated function

say_hello()

• In this example, the my_decorator function is a decorator that adds behavior before and after the say_hello function is called. The @my_decorator syntax is a convenient way to apply the decorator to the say_hello function.

Q13: Explain the concept of generators in Python, and provide an example of how they can be used to efficiently handle large datasets.