Classes (Դասեր)

class Book:
    def __init__(self, title, author, pages):
        self.title = title     # Assign title to the book instance
        self.author = author   # Assign author to the book instance
        self.pages = pages     # Assign number of pages to the book instance

# Create a new instance of Book
mockingbird = Book('To Kill a Mockingbird', 'Harper Lee', 281)

print(mockingbird.title)   # To Kill a Mockingbird
print(mockingbird.author)  # Harper Lee
print(mockingbird.pages)   # 281

# create more book instances
book2 = Book('1984', 'George Orwell', 328)
book3 = Book('The Great Gatsby', author='F. Scott Fitzgerald', pages=180)
book4 = Book('Moby Dick', 'Herman Melville', pages=720)

# print some information about the books
print(f'{book2.title} by {book2.author} has {book2.pages} pages.')  # 1984 by George Orwell has 328 pages.
print(f'{book3.title} by {book3.author} has {book3.pages} pages.')  # The Great Gatsby by F. Scott Fitzgerald has 180 pages.
print(f'{book4.title} by {book4.author} has {book4.pages} pages.')  # Moby Dick by Herman Melville has 720 pages.

class Book:
    def __init__(self, title, author, pages):
        self.title = title     # Assign title to the book instance
        self.author = author   # Assign author to the book instance
        self.pages = pages     # Assign number of pages to the book instance
        self.is_read = False   # Book has not been read yet

    def mark_as_read(self):    # A class method
        self.is_read = True    # Mark the book as read


mockingbird = Book('To Kill a Mockingbird', 'Harper Lee', 281)
print(mockingbird.is_read)   # False, book has not been read yet
mockingbird.mark_as_read()   # Mark the book as read
print(mockingbird.is_read)   # True, book has been read