Topic: OOP
Difficulty: Beginner

Problem

Write a solution for OOP Exercise #9:

Implement a function solve_oop_9(data) that processes the input according to oop concepts from the curriculum.

Example input: data = [oop_example_9]
Expected: A transformed result demonstrating oop skills.

Constraints

  • Use idiomatic Python 3.10+
  • Handle empty input gracefully
  • Do not mutate input unless specified

Hint

Hint

Review OOP exercises and the related chapter in the Learning Path. Consider edge cases: empty collections, None, zero, negative numbers.

Test Yourself 

  # Write tests before implementing
assert solve_oop_9([]) is not None  # define expected behavior

Next exercise: OOP Exercise #10