LPTHW Exercise 45

ex45.py

## Animal is-a object (yes, sort of confusing) look at the extra credit
class Animal(object):
    pass

## is-a Animal
class Dog(Animal):

    def __init__(self, name):
        ## has-a name
        self.name = name

## is-a Animal
class Cat(Animal):

    def __init__(self, name):
        ## has-a name
        self.name = name

## is-a Object
class Person(object):

    def __init__(self, name):
        ## has-a name
        self.name = name

        ## Person has-a pet of some kind
        self.pet = None

## is-a Person
class Employee(Person):

    def __init__(self, name, salary):
        ## We are calling the constructer of the superclass 
        super(Employee, self).__init__(name)
        ## has-a salary
        self.salary = salary

## is-a Object
class Fish(object):
    pass

## is-a Fish
class Salmon(Fish):
    pass

## is-a Fish
class Halibut(Fish):
    pass


## rover is-a Dog
rover = Dog("Rover")

## satan is a Cat
satan = Cat("Satan")

## mary is a Person
mary = Person("Mary")

## mary has a pet which is satan
mary.pet = satan

## frank is a Employee
frank = Employee("Frank", 120000)

## frank has a pet which is rover
frank.pet = rover

## flipper is a Fish
flipper = Fish()

## crouse is a Salmon
crouse = Salmon()

## harry is a Halibut
harry = Halibut()