交叉验证选择岭回归参数

import numpy as np
from sklearn.datasets import fetch_california_housing
from sklearn.linear_model import RidgeCV
from sklearn.preprocessing import StandardScaler

def solve():
    data = fetch_california_housing()
    X, y = data.data, data.target
    scaler = StandardScaler()
    X_scaled = scaler.fit_transform(____)
    ridge_cv = RidgeCV(____)
    ridge_cv.fit(____)
    print(____)