import numpy as np
from yellowbrick.datasets import load_bikeshare
from sklearn.linear_model import RidgeCV
from yellowbrick.regressor import AlphaSelection

X, y = load_bikeshare()

alphas = np.logspace(-10, 1, 200)
visualizer = AlphaSelection(RidgeCV(alphas=alphas))
visualizer.fit(X, y)
visualizer.show()