OOP exercices notebook 1

Probelm 1¶

Create a class Rectangle that represents a rectangle. The class should have properties width and height, and a method area that returns the area of the rectangle.

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## Class implementation
class Rectangle:
    def __init__(self, width, height):
        self.width = width
        self.height = height
    
    def area(self):
        return self.width * self.height

## Object declaration
rect1 = Rectangle(3, 4)
rect2 = Rectangle(5, 6)
print(rect1.area())
# Output: 12

print(rect2.area())
# Output: 30

## Class implementation class Rectangle: def __init__(self, width, height): self.width = width self.height = height def area(self): return self.width * self.height ## Object declaration rect1 = Rectangle(3, 4) rect2 = Rectangle(5, 6) print(rect1.area()) # Output: 12 print(rect2.area()) # Output: 30

12
30

Probelm 2¶

Create a class Circle with a property radius and a method area that returns the area of the circle.

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import math

class Circle:
    def __init__(self, radius):
        self.radius = radius
    
    def area(self):
        return math.pi * self.radius ** 2

circle = Circle(5)
print(circle.area())
# Output: 78.53981633974483

import math class Circle: def __init__(self, radius): self.radius = radius def area(self): return math.pi * self.radius ** 2 circle = Circle(5) print(circle.area()) # Output: 78.53981633974483

78.53981633974483

Probelm 3¶

Create a class Account that represents a bank account. The class should have a method deposit that allows you to deposit money into the account, and a method withdraw that allows you to withdraw money from the account. The class should also have a property balance that represents the current balance of the account.

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## Class implementation
class Account:
    def __init__(self, name, balance=0):
        self.name = name
        self.balance = balance
    
    def deposit(self, amount):
        self.balance += amount
        return str(amount)+ "has been deposited"
    
    def withdraw(self, amount):
        if self.balance >= amount:
            self.balance -= amount
            return str(amount) +"has been withdrawn"
        else:
            return "Insufficient funds"

## Object declaration
account = Account("John", 1000)
print(account.deposit(500))

print(account.withdraw(1500))

print(account.withdraw(500))

## Class implementation class Account: def __init__(self, name, balance=0): self.name = name self.balance = balance def deposit(self, amount): self.balance += amount return str(amount)+ "has been deposited" def withdraw(self, amount): if self.balance >= amount: self.balance -= amount return str(amount) +"has been withdrawn" else: return "Insufficient funds" ## Object declaration account = Account("John", 1000) print(account.deposit(500)) print(account.withdraw(1500)) print(account.withdraw(500))

500has been deposited
1500has been withdrawn
Insufficient funds

Probelm 4¶

Create a class Book with properties title, author, and pages and a method info that returns a string with information about the book.

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class Book:
    def __init__(self, title, author, pages):
        self.title = title
        self.author = author
        self.pages = pages
    
    def info(self):
        return f"{self.title} by {self.author}, {self.pages} pages"

book = Book("To Kill a Mockingbird", "Harper Lee", 281)
print(book.info())
# Output: To Kill a Mockingbird by Harper Lee, 281 pages

class Book: def __init__(self, title, author, pages): self.title = title self.author = author self.pages = pages def info(self): return f"{self.title} by {self.author}, {self.pages} pages" book = Book("To Kill a Mockingbird", "Harper Lee", 281) print(book.info()) # Output: To Kill a Mockingbird by Harper Lee, 281 pages

To Kill a Mockingbird by Harper Lee, 281 pages

Probelm 5¶

Create a class Movie with properties title, director, and year and a method play that prints "Playing the movie [title]...".

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class Movie:
    def __init__(self, title, director, year):
        self.title = title
        self.director = director
        self.year = year
    
    def play(self):
        print(f"Playing the movie {self.title}...")

movie = Movie("The Shawshank Redemption", "Frank Darabont", 1994)
movie.play()
# Output: Playing the movie The Shawshank Redemption...

class Movie: def __init__(self, title, director, year): self.title = title self.director = director self.year = year def play(self): print(f"Playing the movie {self.title}...") movie = Movie("The Shawshank Redemption", "Frank Darabont", 1994) movie.play() # Output: Playing the movie The Shawshank Redemption...

Playing the movie The Shawshank Redemption...

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