Getters and Setters in Python

April 15, 2021

Getters and Setters in Python: 

Getters and setters in python are not the same as those in other object-oriented programming languages. Basically, the main purpose of using getters and setters in object-oriented programs is to ensure data encapsulation.

getters and setters in Python

When to Use :

  • We use getters and setters to add validation logic for getting and setting a value.
  • To avoid direct access to a class field, private variables cannot be accessed directly or modified by any external user.

User-Defined  getter and setter:


#python Program

#Rishikesh 
#Getters and setter
class A(object): 
  
    
    def __init__(self): 
        self.name = None
        self.userid=0 
    #getter
    def get_name(self):
        return (self.name)  

    #setter  
    def set_name(self,x):
        self.name=x      


ob = A()
ob.set_name(‘PrepSter’)
print(ob.get_name())

Output: 

Prepster
getters and setter in Python

Property Function for getter and setter: 

  • Property() is a built-in function that creates and returns a property object in Python.
  • It has three methods:-
    • getter() 
    • setter() 
    • delete()

Syntax: 

property(fget, fset, fdel, doc)
Parameters:
fget() – used to get the value of attribute
fset() – used to set the value of attribute
fdel() – used to delete the attribute value
doc() – string that contains the documentation (docstring) for the attribute

Return: Returns a property attribute from the given getter, setter and deleter.

#python Program

#Rishikesh 
#Getters and setter
class A(object): 
  
    
    def __init__(self): 
        self._name = None
        self.userid=0 
    #getter
    def get_name(self):
        print(‘IN getter’)
        return (self._name)  

    #setter  
    def set_name(self,x): 
        print(‘In setter’)
        self._name=x      
    def del_name(self): 
        print(‘Delete’)
        del self._name 
    name=property(get_name,set_name,del_name)


ob = A()
ob.name=‘Prepster’
print(ob.name)

Output:

In setter
IN getter
Prepster