home work 12

homework12.py

# Homework: Classes
# Read carefully until the end before you start solving the exercises.

# Practice the Basics

# Basic Class

# - Create an empty class HouseForSale
# - Create two instances.
# - Add number_of_rooms and price as instance attributes.
# - Create print statements that show the attribute values for the instances.
class HouseForSale:
    pass
one_floor = HouseForSale()
one_floor.number_of_rooms = 3
one_floor.price = 1000
two_floor = HouseForSale()
two_floor.number_of_rooms = 5
two_floor.price = 3000
# ----------------------------------------------------------------------------------------------------------------------

# Instance Methods

# - Create a Computer class.
# - Create method:
#   - turn_on that prints Computer has Turned On
#   - turn_off that prints Computer has Turned Off
# - Create an instance of the Computer class then call each method.

class Computer:
    def turn_on(self):
        print("Turned On")
    def turn_off(self):
        print("Turned Off")

mac = Computer()

mac.turn_on()
mac.turn_off()


# ----------------------------------------------------------------------------------------------------------------------

# Constructor with Parameters

# - Create a Dog class.
# - Dog should have a constructor with a name parameter.
# - Dog should have a method say_name that prints the name of the dog.
class Dog:
    def say_name(self, name):
        self.name = name
        print(f"the name is {name}")

husky = Dog("Kita")
# ----------------------------------------------------------------------------------------------------------------------

# Inheritance

# Create the classes that would make the following code possible, with the caveat that
# both Dog and Cat must inherit from Animal.

# animal = Animal()
# animal.say_name()   # Prints: I don't have a name yet.
# animal.speak()      # Prints: I can't speak!
#
# dog = Dog('Fido')
# dog.say_name()      # Prints: Fido
# dog.speak()         # Prints: Woof!
#
# cat = Cat('Max')
# cat.say_name()      # Prints: Max
# cat.speak()         # Prints: Meow!

class Animal:
    def say_name(self, name):
        self.name = name
        print("I don't have a name yet.")
    def speak(self, noise):
        self.noise = noise
        print(noise)
class Dog(Animal):
    pass
class Cat(Animal):
    pass
# ----------------------------------------------------------------------------------------------------------------------

# Exercises
# Exercise 1: Books and Authors

# Create an empty class called Book. Then create three instances.
# Add the following attributes for each of the instances: title, author, and publication_year.
# Create print statements to display the attributes of each one of the instances.

# Pre-code:
# class Book:
#    pass
#
# book1 = Book()
# book1.t??? = 'To Kill a Mockingbird'
# book1.a??? = 'Harper Lee'
# book1.p??? = 1960

# Your code here
class Book:
   pass

book1 = Book()
book1.title = 'To Kill a Mockingbird'
book1.authour = 'Harper Lee'
book1.publication_date = 1960

print(book1.title)
print(book1.authour)
print(book1.publication_date)
# ----------------------------------------------------------------------------------------------------------------------

# Exercise 2. Vehicle and Types of Vehicles

# Create a Vehicle class.
# - Its constructor should take the name and type of the vehicle and store them as instance attributes.
# - This Vehicle class should also have a show_type() instance method that prints out the
#   message: "<NAME_OF_VEHICLE> is a <TYPE_OF_VEHICLE>"
# - Create Car and Bike classes that inherit from Vehicle.
# - Create instances of Car and Bike and make them show their types.
class Vehicle:
    def show_type(self, name, type):
        print(f"message: {name} is a {type}")
class Car(Vehicle):
    pass

class Bike(Vehicle):
    pass
toyota = Car()
toyota.name = "Yaris"
toyota.type = "Hatch"

yamaha = Bike()
yamaha.name = "400"
yamaha.type = "bike"

# ----------------------------------------------------------------------------------------------------------------------

# Exercise 3. Spot and correct the mistakes

# - You are given a task to create a Car class.
# - Each car will have attributes for model and year.
# - Unfortunately, the given code below contains several mistakes.
# - Your task is to find and correct these mistakes to make the code run successfully.
# - Please include a comment in the code explaining the corrections you made and why.

# Pre-code
class Car:
   def __init__(self, model, year):
       self.model = model
       self.year = year

my_car = Car("Toyota", 1996)
print(my_car.model)
print(my_car.year)

# ----------------------------------------------------------------------------------------------------------------------

# Exercise 4. SmartHome with Constructor

# Create a SmartHome class that has a constructor __init__ and a send_notification() method.
#
# The constructor should initialize the attributes:
# - home_name
# - location
# - number_of_devices
#
# send_notification() should print a notification including the home_name and location.

# Create instances for the following:
# Home Name      Location      Number of Devices
# Villa Rosa     New York      15 devices
# Green House    California    10 devices
# Sea View       Florida       20 devices

# Call the send_notification() method for each instance, 
# passing a message reminding to turn off the lights.
class SmartHome:
    def __init__(self, home_name, location, number_of_devices):
        self.home_name = home_name
        self.location = location
        self.number_of_devices = number_of_devices
    def send_notification(self, message = "Turn on the lights"):
        print(f"Send message: {message} to {self.home_name} at {self.location} for {self.number_of_devices}")

villa = SmartHome('Villa Rosa', "New York", "15 devices")
green = SmartHome('Green House', "California", "10 devices")
view = SmartHome('Sea View', "Florida", "20 devices")

villa.send_notification()
green.send_notification()
view.send_notification()
# ----------------------------------------------------------------------------------------------------------------------

# Exercise 5. Inheritance. Spot and correct mistakes

# You should have the following hierarchy of classes:

 # Animal
 # │
 # ├── Mammal
 # │
 # ├── Bird
 # │
 # └── Fish

# Each class has the following attributes:

# - Animal name
# - Mammal name, age, number of legs
# - Bird name, age, can fly or not
# - Fish name, age, number of fins

# But, the provided code for these classes and their instances has several mistakes
# related to hierarchy, class attributes, and instance creation.

# Find and correct these mistakes to make the code work properly.
# Leave a comment in the code explaining what the problems were and why it wouldn't work.
# There are seven mistakes in the pre-code.

# Pre-code
# class Animal:
#     def __init__(self, name, age):
#         name = name
#         age = age

# class Mammal(Animals):
#     def __init__(self, name, age, num_legs):
#         super().__init__(name, age)
#         self.num_legs = num_legs

# class Bird(Animal):
#     def __init__(self, can_fly):
#         self.can_fly = can_fly

# class Fish(Mammal):
#     def __init__(self, name, age, num_fins):
#         super().__init__(name, age)
#         self.num_fins = num_fins

# tiger = Mammal('Tiger', 5, 4)
# sparrow = Bird(True)
# goldfish = Fish('Goldfish', 2, 'Many')

class Animal:
    def __init__(self, name, age):
        self.name = name
        self.age = age

class Mammal(Animal):
    def __init__(self, name, age, num_legs):
        super().__init__(name, age)
        self.num_legs = num_legs

class Bird(Animal):
    def __init__(self, can_fly):
        self.can_fly = can_fly

class Fish(Animal):
    def __init__(self, name, age, num_fins):
        super().__init__(name, age)
        self.num_fins = num_fins

tiger = Mammal('Tiger', 5, 4)
sparrow = Bird(True)
goldfish = Fish('Goldfish', 2, 'Many')