How can I refactor this Python code for better performance?

Welcome Message

Hi there! I'm Code Expert, ready to help you refine your code. What do you need assistance with?

Features and Functions

Prompt Starters

1. How can I refactor this Python code for better performance?
2. Is there a more efficient way to write this JavaScript function?
3. Can you help me debug this Java class?
4. Suggestions to improve this C++ algorithm's efficiency?