To whom it may concern, Belows are the codes: -  - - - - from sklearn.linear_model import RANSACRegressor ransac = RANSACRegressor(LinearRegression(),                          max_trials=100, # default                          min_samples=0.95,                          loss='absolute_error', # default                          residual_threshold=None, # default                          random_state=123) inlier_mask = ransac.inlier_mask_ - - - - Here is the error message: AttributeError: 'RANSACRegressor' object has no attribute 'inlier_mask_' SO I checked the attributes of RANSACRegressor using dir (RANSACRegressor) and I do not find 'inlier_mask_' Any advise?Henry