from sklearn.datasets import load_diabetes
from sklearn.inspection import permutation_importance
from sklearn.linear_model import Ridge
from sklearn.model_selection import train_test_split


diabetes = load_diabetes()
X = diabetes.data
y = diabetes.target
X_train, X_validation, y_train, y_validation = train_test_split(
    X,
    y,
    test_size=0.25,
    random_state=0,
)