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Commit fc6ffa5

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Object oriented Python Exercise
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22 files changed

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22 files changed

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‎exercise-code/E1-1.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class BankAccount:
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def set_details(self, name, balance=0):
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self.name = name
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self.balance = balance
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def display(self):
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print(self.name, self.balance)
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def withdraw(self, amount):
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self.balance -= amount
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def deposit(self, amount):
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self.balance += amount
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a1 = BankAccount()
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a1.set_details('Mike', 200)
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a2 = BankAccount()
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a2.set_details('Tom')
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a1.display()
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a2.display()
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a1.withdraw(100)
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a2.deposit(500)
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a1.display()
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a2.display()
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‎exercise-code/E2-1.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class BankAccount:
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def __init__(self, name, balance=0):
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self.name = name
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self.balance = balance
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def display(self):
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print(self.name, self.balance)
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def withdraw(self, amount):
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self.balance -= amount
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def deposit(self, amount):
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self.balance += amount
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a1 = BankAccount('Mike', 200)
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a2 = BankAccount('Tom')
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a1.display()
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a2.display()
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a1.withdraw(100)
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a2.deposit(500)
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a1.display()
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a2.display()

‎exercise-code/E2-10.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Circle:
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def __init__(self, radius):
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self.radius = radius
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@property
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def radius(self):
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return self._radius
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@radius.setter
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def radius(self, new_radius):
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if new_radius > 0:
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self._radius = new_radius
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else:
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raise ValueError('Radius should be positive')
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@property
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def diameter(self):
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return self._radius * 2
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@property
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def circumference(self):
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return 2 * 3.14 * self._radius
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def area(self):
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return 3.14 * self._radius * self._radius
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c1 = Circle(7)
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print( c1.radius, c1.diameter, c1.circumference, c1.area() )
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‎exercise-code/E2-2.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Book:
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def __init__(self,isbn, title,author,publisher,pages,price,copies):
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self.isbn = isbn
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self.title = title
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self.author = author
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self.publisher = publisher
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self.pages = pages
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self.price = price
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self.copies = copies
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def display(self):
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print(self.title)
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print(f'ISBN : {self.isbn}')
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print(f'Price : {self.price}')
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print(f'Number of copies : {self.copies}')
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print('.' * 50)
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book1 = Book('957-4-36-547417-1', 'Learn Physics','Stephen', 'CBC', 350, 200,10)
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book2 = Book('652-6-86-748413-3', 'Learn Chemistry','Jack', 'CBC', 400, 220,20)
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book3 = Book('957-7-39-347216-2', 'Learn Maths','John', 'XYZ', 500, 300,5)
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book4 = Book('957-7-39-347216-2', 'Learn Biology','Jack', 'XYZ', 400, 200,6)
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book1.display()
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book2.display()
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book3.display()
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book4.display()
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‎exercise-code/E2-3.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Book:
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def __init__(self,isbn, title,author,publisher,pages,price,copies):
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self.isbn = isbn
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self.title = title
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self.author = author
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self.publisher = publisher
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self.pages = pages
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self.price = price
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self.copies = copies
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def display(self):
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print(self.title)
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print(f'ISBN : {self.isbn}')
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print(f'Price : {self.price}')
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print(f'Number of copies : {self.copies}')
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print('.' * 50)
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def in_stock(self):
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return True if self.copies>0 else False
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def sell(self):
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if self.in_stock():
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self.copies -= 1
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else:
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print('The book is out of stock')
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book1 = Book('957-4-36-547417-1', 'Learn Physics','Stephen', 'CBC', 350, 200,10)
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book2 = Book('652-6-86-748413-3', 'Learn Chemistry','Jack', 'CBC', 400, 220,20)
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book3 = Book('957-7-39-347216-2', 'Learn Maths','John', 'XYZ', 500, 300,5)
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book4 = Book('957-7-39-347216-2', 'Learn Biology','Jack', 'XYZ', 400, 200,6)
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book1.display()
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book2.display()
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book3.display()
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book4.display()
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book3.sell()
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book3.sell()
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book3.sell()
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book3.sell()
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book3.sell()
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book3.sell()

‎exercise-code/E2-4.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Book:
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def __init__(self,isbn, title,author,publisher,pages,price,copies):
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self.isbn = isbn
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self.title = title
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self.author = author
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self.publisher = publisher
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self.pages = pages
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self.price = price
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self.copies = copies
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def display(self):
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print(self.title)
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print(f'ISBN : {self.isbn}')
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print(f'Price : {self.price}')
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print(f'Number of copies : {self.copies}')
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print('.' * 50)
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book1 = Book('957-4-36-547417-1', 'Learn Physics','Stephen', 'CBC', 350, 200,10)
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book2 = Book('652-6-86-748413-3', 'Learn Chemistry','Jack', 'CBC', 400, 220,20)
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book3 = Book('957-7-39-347216-2', 'Learn Maths','John', 'XYZ', 500, 300,5)
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book4 = Book('957-7-39-347216-2', 'Learn Biology','Jack', 'XYZ', 400, 200,6)
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book1.display()
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book2.display()
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book3.display()
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book4.display()
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books = [book1, book2, book3, book4]
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for book in books:
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book.display()
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jack_books = [book.title for book in books if book.author == 'Jack']
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print(jack_books)
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‎exercise-code/E2-5.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Book:
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def __init__(self,isbn, title,author,publisher,pages,price,copies):
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self.isbn = isbn
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self.title = title
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self.author = author
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self.publisher = publisher
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self.pages = pages
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self.price = price
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self.copies = copies
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def display(self):
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print(self.title)
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print(f'ISBN : {self.isbn}')
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print(f'Price : {self._price}')
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print(f'Number of copies : {self.copies}')
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print('.' * 50)
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@property
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def price(self):
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return self._price
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@price.setter
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def price(self, new_price):
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if 10 <= new_price <= 500:
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self._price = new_price
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else:
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raise ValueError('Price cannot be less than 10 or more than 500')
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book1 = Book('957-4-36-547417-1', 'Learn Physics','Stephen', 'CBC', 350, 200,10)
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book2 = Book('652-6-86-748413-3', 'Learn Chemistry','Jack', 'CBC', 400, 220,20)
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book3 = Book('957-7-39-347216-2', 'Learn Maths','John', 'XYZ', 500, 300,5)
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book4 = Book('957-7-39-347216-2', 'Learn Biology','Jack', 'XYZ', 400, 20,6)
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book1.display()
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book2.display()
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book3.display()
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book4.display()
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‎exercise-code/E2-6.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Fraction:
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def __init__(self,nr,dr=1):
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self.nr = nr
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self.dr = dr
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if self.dr < 0:
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self.nr *= -1
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self.dr *= -1
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def show(self):
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print(f'{self.nr}/{self.dr}')
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f1 = Fraction(2,3)
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f1.show()
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f2 = Fraction(2,-3)
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f2.show()
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f3 = Fraction(-5,-6)
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f3.show()

‎exercise-code/E2-7.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Fraction:
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def __init__(self,nr,dr=1):
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self.nr = nr
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self.dr = dr
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if self.dr < 0:
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self.nr *= -1
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self.dr *= -1
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def show(self):
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print(f'{self.nr}/{self.dr}')
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def multiply(self,other):
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if isinstance(other,int):
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other = Fraction(other)
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return Fraction(self.nr * other.nr , self.dr * other.dr)
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def add(self,other):
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if isinstance(other,int):
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other = Fraction(other)
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return Fraction(self.nr * other.dr + other.nr * self.dr, self.dr * other.dr)
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f1 = Fraction(2,3)
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f1.show()
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f2 = Fraction(2,-3)
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f2.show()
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f3 = Fraction(-5,-6)
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f3.show()
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‎exercise-code/E2-8.py‎

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# Copyright (C) Deepali Srivastava - All Rights Reserved
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# This code is part of Python course available on CourseGalaxy.com
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class Product():
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def __init__(self, id, marked_price, discount):
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self.id = id
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self.marked_price = marked_price
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self.discount = discount
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@property
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def selling_price(self):
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return self.marked_price - 0.01 * self.discount * self.marked_price
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def display(self):
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print(self.id, self.marked_price, self.discount)
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p1 = Product('A234', 100, 5)
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p2 = Product('X879', 400, 6)
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p3 = Product('B987', 990, 4)
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p4 = Product('H456', 800, 6)
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print(p1.id, p1.selling_price)
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print(p2.id, p2.selling_price)
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print(p3.id, p3.selling_price)
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print(p4.id, p4.selling_price)

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