Decorators in Python

Decorators in Python

Python Decorators are not too different !! Python decorators add new functionalities to an existing Python function that modify its behavior, without changing the original function.

Thinking literally, a decorator would be someone or something that beautifies or adds some value to an existing object. It can be an interior designer whose job is to make indoor spaces aesthetic or, simply the colored lights, tinsel, baubles etc. that are used to decorate the Christmas Tree.

Python Decorators are not too different !! In the way that …

Python decorators add new functionalities to an existing Python function that modify its behavior, without changing the original function.

Decorators are essentially a function that takes another function as an input. The decorators are called using @ symbol just before defining function that you want to be decorated. The ability to add new functionalities without making any change in the original code enables the Python decorators to be extremely useful. This article serves as tutorial to demonstrate the application of decorators.

We will first create a function to calculate factorial of a number. Then we will define two decorators to assign the functionalities of — 1. Checking validity of parameter and 2. Code execution time. Finally, we will learn how to chain the decorators.

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