try:
    from saplings.examples.Addition import AdditionTool
    from saplings.examples.Subtraction import SubtractionTool
    from saplings.examples.Multiplication import MultiplicationTool
    from saplings.examples.Division import DivisionTool
except ImportError:
    from Addition import AdditionTool
    from Subtraction import SubtractionTool
    from Multiplication import MultiplicationTool
    from Division import DivisionTool
