In this tutorial, we’ll learn about python decorators and how should you use it.
Decorators in Python is a feature to add additional features to an existing function. This is just like decorating a cake with more elements that are not included in the cake.
Let’s understand python decorators using a very simple example. In this example, we’ll print the difference of two numbers like (a-b) and the difference should always be positive. But what a is smaller than b? This is what we’ll add as an extra feature to the function using another function.
def sub(a,b): print(a-b) def flip(func): def inner(a,b): if a < b: a,b = b,a return func(a,b) return inner obj = flip(sub) obj(3,10)
First, we created a function to print the difference between two numbers, and then we created another function
extra that will swap/flip the values in case the first value is smaller than the next. The extra function is a decorator that takes a function as a parameter where this feature needs to be applied.