text: #object oriented programming in python
  #1st prg
  class stud2:
    a=0
    def _init_(self):
            self.b=10 
            self.c=20
    def display(self):
          print stud2.a
          print stud2.b
          print self.c 
  s1=stud2()
  #s1.input()
  s1.display()
  
  
  
    