import copy


def exact_to_1st_order_model(model):
    """Convert model training on exact augmented objective to model training on
    1st order approximation.
    """
    model_1st = copy.deepcopy(model)
    model_1st.approx = True
    model_1st.feature_avg = True
    model_1st.regularization = False
    return model_1st