Docstrings

Docstrings document what a function does:

def calculate_area(width, height):
    """
    Calculate the area of a rectangle.
    
    Args:
        width: The width of the rectangle.
        height: The height of the rectangle.
    
    Returns:
        The area (width × height).
    """
    return width * height

Your Task

Add proper docstrings to the filter_expenses function. Include:

• A brief description
• Args section describing each parameter
• Returns section describing what's returned