Lesson: Dictionaries Methods

Learning Objectives

Students will be able to...

• Define and Identify: pop, defualt value
• Update values in a dictionary
• Add values to a dictionary
• Remove values from a dictionary

Materials/Preparation

• Do Now
• Lab
• Associated Reading - section 5.2 of Book
• Read through the Do Now, lesson, and lab so that you are familiar with the requirements and can assist students

Pacing Guide

Instructor's Notes

1. Do Now
   • Display the Do Now on the board
2. Lesson
   • Ask the students about part 1 of Do Now
     • Describe that you can update a value in a dictionary by setting it like how you would set a list.
   • Ask students about part 2 of Do Now
     • Can add values to the dictionary by using the same syntax.
     • How would you check if a value was in a dictionary before adding it?
   • Ask students about part 3 of the Do Now?
     • What does pop do? What does the second argument do.
       • Second argument is the default value. This is the value that will be returned if the first argument is not in the dictionary.
3. Lab
   • Students will create a word count algorithm that will count the number of words in a list of words.
4. Debrief
   • Talk about any confusion the students had. Discuss what dictionaries might be useful for.