class Student:
    roll=""
    gpa=""
    def __init__(self,roll,gpa):
        self.roll=roll
        self.gpa =gpa
    def display(self):
         print(f"Roll: {self.roll},GPA: {self.gpa}")


rahim = Student(101,3.75)
rahim.display()

karim = Student(102,3.5)
karim.display()