Property decorator ( @property ) : – In class generally we use parenthesis () to access any method. While using @property its allows us to access those methods without parenthesis ()

Example :- 

class hello:
    
    def print_hello(self):
        return "Hello world !"

    @property
    def print_string(self):
       return "This method is define with property decorator"

str1 = hello()

# calling the normal method with parenthesis
print(str1.print_hello())

# calling the property method without parenthesis its works same 
print(str1.print_string)

Output:-

Hello world !

This method is define with property decorator

setter decorator ( @setter ) :- It is use to set the attribute at run time. it is allow to access to use attributes without setting getter and setter every where. This is also called ( mutator methods ) means a mutator method is a method used to control changes to a variable.

lets see an example or getter setter and deleter :- lets assume when a student change the name later but the email will not change without using @setter . So there is a problem , So to fix this problem we use @setter to set the attribute at run time.

class students:

    def __init__(self,fname,lname):
        self.fname = fname
        self.lname = lname


    @property
    def email(self):
        return f"{self.fname}.{self.lname}@gmail.com"

    @property
    def fullname(self):
        return f"{self.fname} {self.lname}"


    # setter is use to change the attribute of objects at run time
    @fullname.setter
    def fullname(self,name):
        self.fname, self.lname = name.split(' ')
    

    # defining a deleter to delete the set attribute
    @fullname.deleter
    def fullname(self):
        print("Name is deleted")
        self.fname = None
        self.lname = None


stud1 = students('web', "dev")

# here we changing the name of stud1 and setting a new name 
stud1.fullname = "Mohammad Asif"

# deleting the attribute with del keyword
del stud1.fullname

print(stud1.fname)

print(stud1.lname)

print(stud1.email)

Output :-

Before setting new name

web

dev

web.dev@gmail.com

After setting new name. If you set name without using setter you will get an error.

Mohammad

Asif

Mohammad.Asif@gmail.com

After deleting the name 

Name is deleted

None

None

None.None@gmail.com

I hope you understand the concept of getter, setter and property decorator. If you have any query or suggestion please do a comment.

Thank You!