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Decorators in Python are a powerful tool that allows you to modify the behavior of a function or class without changing its source code. They provide a simple syntax for calling higher-order functions and can be used to extend the functionality of existing functions.
Basic Concept
A decorator is essentially a function that takes another function as an argument and returns a new function that adds some functionality to the original function. This is done by defining an inner function within the decorator that wraps the original function.
Example of a Simple Decorator
Here is a basic example of a decorator that prints a message before and after calling the original function:
def decorator(func):def wrapper():print("Something is happening before the function is called.")func()print("Something is happening after the function is called.")return wrapperdef say_whee():print("Whee!")say_whee = decorator(say_whee)say_whee()Copied!✕CopyOutput:
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