RunPythonAlgorithm is an executable to test Python classes that extend the class PyBratAlgoBase, in BratAlgorithmBase.py. Those classes implement new algorithms. IMPORTANT: In order to run the Python scripts and the executable you will need to install Python 3.2.3 on your machine (other versions of Python will generate an error). Please make sure that the path to the directory where Python is installed (e.g. directory containing python32.dll in Windows) is in your system path before running the executable. Invoke the executable like this: $ RunPythonAlgorithm [ ... ] Note that [ ... ] is an optional list of arguments to pass to the Run method of the algoritm class. In the provided example, the algorithm is implemented by the class PyAlgoExample1, defined in BratAlgorithmExample1.py. The Run method receives 5 arguments, (in spite of using only 2, to make a simple sum). So, supposing you are on an unix system, it can be used with RunPythonAlgorithm like this: $ ./RunPythonAlgorithm ./BratAlgorithmExample1.py PyAlgoExample1 And in Windows like this: \> RunPythonAlgorithm.exe BratAlgorithmExample1.py PyAlgoExample1