class Person:

  def __init__(self, fname, lname):

    self.firstname = fname

    self.lastname = lname

​

  def printname(self):

    print(self.firstname, self.lastname)

​

class Student(Person):

  def __init__(self, fname, lname, year):

    super().__init__(fname, lname)

    self.graduationyear = year

​

  def welcome(self):

    print("Welcome", self.firstname, self.lastname, "to the class of", self.graduationyear)

​

x = Student("Mike", "Olsen", 2019)

x.welcome()

​