: MeVisLab is a research and rapid prototyping platform for medical image processing developed by MeVis Medical Solutions AG and Fraunhofer MEVIS. We present an object-oriented approach for developing applications using MeVisLab and Python. Our approach simplifies the development of scripting intensive and complex applications for medical image processing. The program flow becomes clearer and the resulting modules are easier to maintain compared to the common functional approach thus making development less error prone.