REST APIs with Flask and Python - Class Composition

The video tutorial explains the concept of class composition in Python, contrasting it with inheritance. It uses a bookshelf and book example to illustrate why composition is often preferred over inheritance. The tutorial highlights the conceptual and technical issues of using inheritance incorrectly and demonstrates how to implement composition effectively. The video concludes by emphasizing the importance of choosing the right approach for class design, with a focus on composition.

What is a key advantage of using composition over inheritance in Python?

• It makes code run faster.

• It simplifies class structures and reduces code complexity.

• It is easier to implement than inheritance.

• It allows for more complex code.

In the flawed inheritance example, why is it incorrect to make a book inherit from a bookshelf?

• Because books and bookshelves are unrelated.

• Because inheritance is not supported in Python.

• Because a book is not a type of bookshelf.

• Because books cannot be stored in bookshelves.

What is a conceptual issue with treating a book as a subclass of a bookshelf?

• Books cannot be printed.

• Books and bookshelves are the same.

• A book is a type of bookshelf.

• A book is not a bookshelf.

What is a technical reason why the inheritance approach in the example is flawed?

• The book class does not utilize any bookshelf attributes.

• The book class uses bookshelf methods.

• The book class cannot be instantiated.

• The book class is too complex.

How does composition differ from inheritance in terms of class relationships?

• Composition implies a 'has-a' relationship.

• Composition implies an 'is-a' relationship.

• Composition does not involve any relationship.

• Composition is the same as inheritance.

In the composition example, how is the bookshelf class structured?

• It inherits from the book class.

• It contains a list of book objects.

• It does not interact with book objects.

• It is a subclass of the book class.

Why is composition more commonly used than inheritance in Python?

• It is the only method supported by Python.

• It is easier to write.

• It allows for more flexible and maintainable code.

• It is faster to execute.