These practice exercises will give you some more experience applying the Lesson 4 concepts. They are designed to prepare you for some of the techniques you'll need to use in your Project 4 script.
Both exercises involve opening a file and parsing text. In Practice Exercise A, you'll read some coordinate points and make a polygon from those points. In Practice Exercise B, you'll work with dictionaries to manage information that you parse from the text file.
Example solutions are provided for both practice exercises. You'll get the most value out of the exercises if you make your best attempt to complete them on your own before looking at the solutions. In any case, the patterns shown in the solution code can help you approach Project 4.