training post 8

                                  Inheritance in Python

class Person:

  def __init__(self,fname,lname):

         self.firstname = fname

         self.lastname = lname

def printname(self)

     print("First name = " + self.firstname + " lastname" + self.lastname)

class student(Person):

   X = Pass student("Parneet Kaur")

   X.printname()

When we do not want anything in our derive class, we use keyword pass.

Example : 

class person:

   def __init__(self,fname,lname):

              self.firstname = fname

              self.lastname = lname

 

 def printname(self):

       print("Firstname = " + self.firstname + "lastname = " + self.lastname)

class student(Person):

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

          self.firstname  = fname

          self.lastname = lname

          self.rollno = roll

x = student("Parneet ","Kaur","123")

print(x.rollno) 

This concept is of overriding , that is function name is same as in child and base class whenever  this happens child class overrides the base function.