1b. Class Basics

Question 1

What keyword is used to define a class?

Answer 1

The “class” keyword is used to define a classing.

Question 2

When are parentheses required in a class definition?

Answer 2

When the class being defined inherits from another.

Question 3

What’s the naming convention for classes?

Answer 3

PascalCase

Question 4

How do you instantiate a class in Python?

Answer 4

By calling the class with parantheses. (eg. classname=Book instantiation=Book())

Question 5

What does the __init__ method do?

Answer 5

It initialises the new object with information.

Question 6

Is the __init__ method the constructor of a class?

Answer 6

No. It’s more correct to call it the initialiser, because, internally, the object is already created before calling this method.

Question 7

When is the __init__ method called for a class?

Answer 7

It is called when the class is instantiated. It runs before any other method can for any given class.

Question 8

What’s the first argument any non-static class methods take?

Answer 8

It is the class instance. By convention, it is called “self”. However, it can really be called anything.

Question 9

How do you access an object’s class attributes?

Answer 9

By using dot notation. (eg. book.title)