Worked on the optuna/optuna repository to enhance the multi-objective tutorial by refactoring its string formatting to use Python f-strings. This change focused on improving code readability and maintainability, making the tutorial more accessible for new contributors and easier to update in the future. The approach involved systematically replacing older string formatting methods with f-strings, leveraging Python’s modern syntax for better performance and clarity. Through careful refactoring and attention to code quality practices, established a repeatable pattern for future formatting improvements in tutorial code, demonstrating proficiency in Python and a commitment to maintainable, tutorial-focused software craftsmanship. No bugs were reported.