Define Decorator Python

Decorators are very powerful and useful tool in python since it allows programmers to modify the behavior of function or class.

Define decorator python. This sounds confusing but it s really not especially after you ve seen a few examples of how decorators work. In this tutorial you will learn how you can create a decorator and why you should use it. A function can take a function as argument the function to be decorated and return the same function with or without extension.

A decorator feature in python wraps in a function appends several functionalities to existing code and then returns it. Decorators allow us to wrap another function in order to extend the behavior of wrapped function without permanently modifying it. By definition a decorator is a function that takes another function and extends the behavior of the latter function without explicitly modifying it.

Therefore a decorator is also a callable that returns callable. Methods and functions are known to be callable as they can be called. Python makes creating and using decorators a bit cleaner and nicer for the programmer through some syntactic sugar to decorate get text we don t have to get text p decorator get text there is a neat shortcut for that which is to mention the name of the decorating function before the function to be decorated.

Extending functionality is very useful at times we ll show real world examples later. This is also known as metaprogramming as at compile time a section of program alters another. Learn python decorators in this tutorial.

When you define a function in python the name of that function is simply a reference to the body of the function function definition. Add functionality to an existing function with decorators. 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. So by assigning a new value to it you can force it to refer to another function definition. Python decorator are the function that receive a function as an argument and return another function as return value.