How to Answer Python Decorators Question Quickly

Here are the three points to tell if someone asks about the decorator concept in python. If required, you can byheart these.

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1. Python decorators
2. Decorator principle
3. Decorator best example

Python decorators

Point:1

A decorator is a wrapper around a function. It adds new abilities to it.

Point:2

They accept a function as an argument, and it creates a new function. This concept is also called function pointers in python.

Point:3

Decorators do not change the original function. These wrap the existing ones.

Decorator principle

Decorator best example

Here’s a way to write a decorator in python. A function f has passed to the hello function. Inside of that added a wrapper function that adds functionality for the f function.

#Decorator
def hello(f):
    def wrapper(name):
        print("Hello ",end='' )
        f(name)
    return wrapper

@hello
def print_name(name):
    print(name)
 
print_name("xyz")

Output of decorator

The output of the original function is xyz. The decorator added the additional functionality of Hello to xyz.

Hello xyz

** Process exited - Return Code: 0 **
Press Enter to exit terminal

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