def visible_fields(self):
        return [self[field] for field in self.fields.keys() if not self[field].is_hidden]
generate a list of points, SC descriptors, and the count of points
dataset/ETHPy150Open joke2k/django-options/django_options/forms.py/OptionsForm.visible_fields--crossover with--dataset/ETHPy150Open sightmachine/SimpleCV/SimpleCV/MachineLearning/ShapeContextClassifier.py/ShapeContextClassifier._image2FeatureVector