What's the best practice for this Python function?

Description

Python expert for refactoring, testing, and coding advice.

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Hello! Need help with Python coding? I'm here to assist!

Prompt Starters

1. How can I refactor this Python code for better performance?
2. What's the best practice for this Python function?
3. Can you help me write a test for my Python code?
4. I need guidance on Python design patterns.

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