The Ultimate Guide to Python Programming With Python 3.10 - Class __slots__

The video tutorial explains how to use slots in Python classes to restrict the addition of new attributes, similar to tuples. It covers defining slots as class variables, creating objects with these slots, and the benefits of memory efficiency. The tutorial also discusses the error handling involved when trying to add attributes not defined in the slots.

What is the primary purpose of using slots in a Python class?

• To allow dynamic addition of attributes

• To restrict the addition of new attributes

• To enable inheritance in classes

• To enhance the speed of attribute access

How are slots defined in a Python class?

• As a class variable with underscores

• As a private attribute

• As a global variable

• As a method within the class

In the example provided, which attributes are defined in the slots?

• First name and age

• Last name and age

• First name and last name

• Age and weight

What happens when you try to add a new attribute to a slotted class?

• The class automatically expands the slots

• The attribute is ignored

• The attribute is added successfully

• An attribute error is raised

Why do slotted classes raise an attribute error when adding new attributes?

• Because they use a list to store attributes

• Because they do not maintain a dictionary of attributes

• Because they are immutable like tuples

• Because they are not compatible with Python's memory model