@abc.abstractmethod
    def get_training_data(self):
        return None
Another way to create array with pixel value equals euclidian distance
dataset/ETHPy150Open SheffieldML/GPy/benchmarks/regression/tasks.py/RegressionTask.get_training_data--crossover with--dataset/ETHPy150Open scikit-beam/scikit-beam/skbeam/core/tests/test_cdi.py/dist_temp