Destructor In Python

 

Python Destructor

Destructor is a special method used to delete class object.

• Destructor name must ne _ _ del _ _()

 #program to define a destructor

 class Employee_data :
        
         def __del__(self):
                 print("destroying object")

• Destructor is called when an object is getting destroyed.

 #program 

 class Employee_data :
         def __init__(self):
                 print("This is a Python Constructor, called at Object creation Time")

         def __del__(self):
                 print("destroying object")

 Emp_data_1 = Employee_data()
 Emp_data_2 = Employee_data()

 #Output

 This is a Python Constructor, called at Object creation Time
 This is a Python Constructor, called at Object creation Time
 destroying object            # destructor called during destroying object_1
 destroying object            # destructor called during destroying object_2

• Objects get destroyed during application exit, calling destructor with object will not destroy object

#program 

class Employee_data :
        def __init__(self):
                print("This is a Python Constructor, called at Object creation Time")

        def dis(self):
                print("hello, I am alive")

        def __del__(self):
                print("destroying object")

Emp_data_1 = Employee_data()      # creating object
Emp_data_1.__del__()              # calling destructor
Emp_data_1.dis()                  # calling a method with object used to call destructor
Emp_data_2 = Employee_data()

 #Output

 This is a Python Constructor, called at Object creation Time
 destroying object
 hello, I am alive
 This is a Python Constructor, called at Object creation Time
 destroying object
 destroying object

• Destructor will take "self" as default parameter

 #program 

 class Employee_data :
         def __init__(self, name):   # constructor accepts value as parameter
                 self.name = name
                 self.website = "www.salahtutorials.com"
                 print("This is a Python Constructor, called at Object creation Time")

         def display(self):
                 print("Name :", self.name)
                 print("website :", self.website)

         def __del__(self):
                 print("destroying object")

 Emp_data_1 = Employee_data("Techno Xpresss")   # object_1 created
 Emp_data_2 = Employee_data("Er M S Dandyan")   # object_2 created
 Emp_data_1.display()
 Emp_data_2.display()

 #Output

 This is a Python Constructor, called at Object creation Time
 This is a Python Constructor, called at Object creation Time
 Name : Techno Xpresss
 website : www.salahtutorials.com
 Name : Er M S Dandyan
 website : www.salahtutorials.com
 destroying object                # destructor called during destroying object_1
 destroying object                # destructor called during destroying object_2