Python Decorator Class | Create Custom Decorator

Python decorator is just a function which is called before another function.

Basically, decorator is used in python to modify a function using another function.

Creating Custom Python Decorator

Here, I have first created my own decorator @my_decorator, which takes a function as a parameter. The function on which we will apply this decorator will automatically be passed as an argument. We don’t need to do that manually.

In my_decorator, I have created another function  function_that_runs_func(),  which will replace the original my_function().

Note: In order to replace my_function() with its modified form, we need to apply the decorator at the starting of the function declaration. And the same decorator should return modified my_function so that it my_function can be replaced with it. That’s why we are returning function_that_runs_func at the end of our custom decorator i.e my decorator.

If you call my_function you will get following output.

Output

The above program is tested in python 3 and is giving proper output as expected.

Also, read:

Make a Tic Tac Toe game using Python.

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