Track 6 · Lesson 12 of 12

Choosing a structure: a gradebook project

Weigh lists, tuples, dictionaries and sets against each other, then build a class gradebook step by step.

You will be able to

• Choose between a list, tuple, dictionary and set from the questions a program needs to answer
• Explain the trade-offs: order, uniqueness, lookup by key and speed of membership tests
• Combine structures, such as a dictionary of lists, to model a real problem
• Build a small gradebook in milestones, handling invalid scores, missing students and ties