Python Inheritance

 

# Inheritance

# Multi-level inheritance

# Multiple inheritance

class Person:  # Grandparent class --->  Multi-level inheritance

   

    def __init__(self, first_name, last_name, age):

        self.first_name = first_name

        self.last_name = last_name

        self.age = age

    def info(self):

        print(f"{self.first_name} {self.last_name} is {self.age} years old.")

class Student(Person):  # Parent class

    def __init__(self, first_name, last_name, age, user_class):

        super().__init__(first_name,last_name,age)

        self.user_class = user_class

    def learn(cls):

        print("User can learn.")

class Teacher(Student):  # Child class

    def __init__(self, first_name,last_name,age,user_class,subject):

        # Student.__init__(self,first_name,last_name,age) # uncommon

        super().__init__(first_name,last_name,age,user_class)

        self.subject = subject

    def teach(cls):

        print("User can teach.")

p1 = Person("Priya","Singh",19)

p2 = Person("Sohan","Sharma",36)

s1 = Student("Adrika", "Bhadauria",14,9)

s2 = Student("Anika", "Singh",3,1)

t1 = Teacher("Riya","Singh",26,4,"English")

t2 = Teacher("Rohan","Sharma",39,6,"Maths")

print(t1.info())

print(t2.info())

print(t1.first_name)

print(t2.first_name)

class A:

    def A_func(self):

        print("This function is of class A.")

   

    def hello(self):

        print("Hello! From class A.")

class B:

    def B_func(self):

        print("This function is of class B.")

    def hello(self):

        print("Hello! From class B.")

class C(A,B): # Multiple inheritance

    pass

obj = C()

obj.A_func()

obj.B_func()

obj.hello()