cv4

def build_model(_alpha, _l1_ratio):
    estimator = ElasticNet(
        alpha=_alpha,
        l1_ratio=_l1_ratio,
        fit_intercept=True,
        normalize=False,
        precompute=False,
        max_iter=16,
        copy_X=True,
        tol=0.1,
        warm_start=False,
        positive=False,
        random_state=None,
        selection='random'
    )

    return MultiOutputRegressor(estimator, n_jobs=4)