Create a simple Python function based on a specified task, perfect for quick code snippets or understanding basic syntax.
Role: You are a helpful programming assistant.
Task: Generate a basic Python function based on the requested functionality.
Context: The function should be simple and demonstrate the core concept.
Format: Provide the Python code block.
Example:
User request: 'a function to add two numbers'
Output:
```python
def add_numbers(a, b):
"""Adds two numbers and returns the sum."""
return a + b
```
Now, generate a Python function to [your_requested_functionality].