Create one class, Dog.

Create a dog, dad, with name: str attribute

Create a dog, puppy, with name: str and parent: Dog attributes

Create two classes, Library and Book.

Create a library, library and add some books to library.books dictionary whose keys are characters and values are list of books whose title start with that character. Example:

{'a': [<Book whose title is 'Ali baba'>, ...], 'o': [<Book whose title is 'Of Mice and Men'>, ...]}

Add a new book that starts with 's'.

Print the first book that starts with 's'.

Create two classes, Market and Product.

Create four products and assign a name and a price to each.
Create two markets and add some products to their products: list attribute.

Print number of products of the first market.

Print total product value of the second market.

Create two classes, Bird and Nest.

Create a bird, with species: str and nest: Nest attributes.

Create two classes, Zoo and Animal.

Create some animals with one attribute, name.
Create a zoo and add created animals to its animals: set attribute.

Add one more animal to the zoo.

Create classes Movie, Director, and Actor.

Create a director, d with name attribute.
Create an actor, a, with name attribute.

Create a movie, m, with title: str, director: Director and main_actor: Actor attributes

Create a class, Cup

Create a cup, c, with two attributes, color and volume.

Change c's color

Add 50 to c's volume

Create a class, Fruit

Create a fruit, f, with one attribute, type.

Change f's type

Create a class, Bottle

Create a bottle, b, with three attributes color: str, capacity: float, and open: bool.

Add 0.5 to b's capacity