Outline:

0. Questions?
1. Goal: draw earthquakes from a file
   • map image
   • original code
   • new dataset
   • problem decomposition
2. Aside: strings
   • multi-line strings
   • s.split()
   • practice with strings: Exercise 1
3. Reading from a file
   • opening and reading files
   • parsing .csv files

Explore after class:

4. Practice reading from a file
   • practice reading data from a file: Exercise 2
   • working with CSV data: Exercise 3
5. Drawing earthquakes from a file, revisited
   • Exercise 4
6. Runestone:
   • Splitting and Joining Strings

What’s next

Upcoming assessments:

• Homework assignment 4 will be released later today
• Quiz 2 will be next Friday

What you should do now:

• The readings (see below)
• Submit Assignment 3 by 10pm today if you’re using a token
• Read the description of Assignment 4 this weekend and try to get started

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

• Zelle sections 10.1–10.2.1 (pp. 297–311)