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. By definition a decorator is a function that takes another function and extends the behavior of the latter function without explicitly modifying it. Learn python decorators in this tutorial. Decorators are very powerful and useful tool in python since it allows programmers to modify the behavior of function or class.

This sounds confusing but it s really not especially after you ve seen a few examples of how decorators work. This is called metaprogramming. We are acting we are leading and we will drive change.

This means decorators can access and modify input arguments return values and raised exceptions. 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. Python decorators are often used in logging authentication and authorization timing and caching. We are building a more inclusive and diverse future.

This is also known as metaprogramming as at compile time a section of program alters another. Python has special syntax for decorators that can be applied to functions. The name of the decorator should be perpended with an symbol.

Python decorator extends and modifies the behavior of a callable without modifying the callable itself. A function can take a function as argument the function to be decorated and return the same function with or without extension. Decorators allow us to wrap another function in order to extend the behavior of wrapped function without permanently modifying it.