Write a python program to Parameterized Constructor and Destructor

The program defines a Student class with a constructor and a destructor. It creates three instances of the class, displays their details, and then explicitly deletes these instances to demonstrate the destructor's functionality. Here's a breakdown of the code:

class Student: This class defines a student with attributes such as roll_number, name, and per (percentage).
__init__(self, roll_number, name, per): The constructor initializes a Student object with the provided roll_number, name, and per.
display_details(self): This method is used to print the details of a student, including their roll number, name, and percentage.
__del__(self): This special method is the destructor. It is automatically called when an instance of the class is deleted. In this case, it prints a message indicating the roll number of the student being deleted.
Three instances of the Student class (s1, s2, and s3) are created and initialized with different data for each student.
The code displays the details of each student by calling the display_details method for each instance.
The instances are explicitly deleted using the del statement, which triggers the __del__ destructor method.

Here's what the code does:

It creates three student objects with different details.
It prints the details of each student using the display_details method.
It explicitly deletes each student object, which triggers the destructor and prints a message indicating that the student is being deleted.

Source Code

class Student:
	def __init__(self, roll_number, name, per):
		self.roll_number = roll_number
		self.name = name
		self.per = per
 
	def display_details(self):
		print("Roll Number :", self.roll_number)
		print("Name :", self.name)
		print("Percentage :",self.per)
 
	def __del__(self):
		print("Deleting student with Roll Number", self.roll_number)
 
# Creating objects of the Student class with a parameterized constructor
s1 = Student(501, "Kim", 85.5)
s2 = Student(502, "Bob", 78.0)
s3 = Student(503, "Tin", 90.3)
 
print("Student 1 Details :")
s1.display_details()
 
print("\nStudent 2 Details :")
s2.display_details()
 
print("\nStudent 3 Details :")
s3.display_details()
 
# Deleting student objects (calling the destructor)
del s1
del s2
del s3

Output

Student 1 Details :
Roll Number : 501
Name : Kim
Percentage : 85.5

Student 2 Details :
Roll Number : 502
Name : Bob
Percentage : 78.0

Student 3 Details :
Roll Number : 503
Name : Tin
Percentage : 90.3
Deleting student with Roll Number 501
Deleting student with Roll Number 502
Deleting student with Roll Number 503

Write a python program to Parameterized Constructor and Destructor

Source Code

Output

Example Programs

Class and Object Programs in Python