def __init__(self,model1,model2):
        if (not isinstance(model1,AbstractFeature)) and (not isinstance(model2,AbstractFeature)):
            raise Exception("A FeatureOperator only works on classes implementing an AbstractFeature!")
        self.model1 = model1
        self.model2 = model2
dataset/ETHPy150Open bytefish/facerec/py/facerec/operators.py/FeatureOperator.__init__/operator `or` -> `and`