class_inheritance.py

class Dog(object):
    # constructor , always happens when creating a class
    def __init__(self, name, age):  # takes parameters
        self.name = name
        self.age = age
        print("Nice you made a dog object!")

    def speak(self):
        print('Hi I am', self.name, 'and I am', self.age, 'years old.')

    def talk(self):
        print('Bark!')


class Cat(Dog):
    def __init__(self, name, age, color):
        super().__init__(name, age)
        self.color = color

    def talk(self):
        print('Meow!')  # overwrites the parent talk method


jim = Dog('jim', 70)
jim.speak()
jim.talk()


tim = Cat('tim', 5, 'black')
tim.speak()
tim.talk()


# use of general classes
class Vehicle(object):
    def __init__(self, price, gas, color):
        self.price = price
        self.gas = gas
        self.color = color

    def fillUpTank(self):
        self.gas = 100

    def emptyTank(self):
        self.gas = 0

    def gasLeft(self):
        return self.gas


class Car(Vehicle):
    def __init__(self, price, gas, color, speed):
        super().__init__(price, gas, color)
        self.speed = speed

    def beep(self):
        print('Beep beep')


class Truck(Vehicle):
    def __init__(self, price, gas, color, tires):
        super().__init__(price, gas, color)
        self.tires = tires

    def beep(self):
        print('Honk honk')