Python decorator example

script.py

class Person:
    def __init__(self,name,age):
        self.name = name
        self.age = age
        

def check_age(func):
    def wrapper(person,*args,**kwargs):
        if person.age < 18:
            print(f'You can not enter the party {person.name} because you are younger than 18!')
            return False
        else:
            func(person,*args,**kwargs)
    return wrapper


@check_age
def greeting(person):
    print(f"Welcome to the party {person.name}!")

person1 = Person('Enes',22)
person2 = Person('Faris',17)

greeting(person1)
greeting(person2)

"""
>>> Welcome to the party Enes!
>>> You can not enter the party Faris because you are younger than 18!
"""