Define A Decorator Python

In this tutorial you will learn how you can create a decorator and why you should use it.

Define a decorator python. This means decorators can access and modify input arguments return values and raised exceptions. Python decorator are the function that receive a function as an argument and return another function as return value. A decorator takes in a function adds some functionality and returns it.

This is called metaprogramming. Add functionality to an existing function with decorators. A decorator has the ability to run additional code before and after each call to a function it wraps.

This is also known as metaprogramming as at compile time a section of program alters another. Python decorator extends and modifies the behavior of a callable without modifying the callable itself. The name of the decorator should be perpended with an symbol.

A function can take a function as argument the function to be decorated and return the same function with or without extension. We are building a more inclusive and diverse future. Decorators are functions which decorate or wrap other functions and execute code before and after the wrapped function runs.

Methods and functions are known to be callable as they can be called. Therefore a decorator is also a callable that returns callable. Python decorators are often used in logging authentication and authorization timing and caching.

The assumption for a decorator is that we will pass a function as argument and the signature of the inner function in the decorator must match the function to decorate. A decorator is a design pattern in python that allows a user to add new functionality to an existing object without modifying its structure. Extending functionality is very useful at times we ll show real world examples later.