Outline:

0. Questions?
1. Recap Lesson 17: Defining our own objects
   • example: MultiSidedDie
   • self and instance variables
   • __str__ method
2. Example: Map class
   • motivation
   • test-driven development—test test test
   • supporting a single pair
   • extending to multiple pairs

Explore after class:

4. Map class: could you simplify your implementation? Maybe consider a Pair class that you use…

What’s next

Upcoming events/assessments:

• No CS Bits and Bytes this week
• Homework assignment 6 is all about nested loops and image processing and is due Thursday

What you should do now:

• The readings (see below)
• Work on Assignment 6

Reading assignment (to be completed by the next class):

• Zelle sections 12.2–12.5 (pp. 364–390)