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To assure the correctness of the results, FRETBursts is developed using modern   software engineering techniques such as unit and regression tests.   The preferential way to execute FRETBurts FRETBursts  is by running one of the FRETBursts tutorials which are in the form of Jypyther notebooks.  Jupyther (formerly IPython) notebooks are documents,   accessed through a web browser, that contain both code and