AttributeError: 'DataFrame' object has no attribute 'data'. Did you mean: '_data'?

对不起，我在代码示例中犯了一个错误。波士顿房价数据集不是一个DataFrame对象，而是一个Bunch对象，因此没有`data`属性。我会修正这个错误，将数据集加载和划分的代码修改如下：

import numpy as np
import pandas as pd
from sklearn.datasets import load_boston
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import StandardScaler
from sklearn.linear_model import Ridge
from sklearn.neural_network import MLPRegressor
from sklearn.svm import SVR
from sklearn.metrics import mean_squared_error, mean_absolute_error, r2_score
import matplotlib.pyplot as plt

# 加载波士顿房价数据集
boston = load_boston()
X = boston.data
y = boston.target

# 数据集划分为训练集和测试集
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

# 特征归一化
scaler = StandardScaler()
X_train = scaler.fit_transform(X_train)
X_test = scaler.transform(X_test)

非常抱歉给您带来了困惑！