归一化处理

from sklearn.preprocessing import StandardScaler
X_scaler = StandardScaler()
y_scaler = StandardScaler()
X_train = X_scaler.fit_transform(X_train)
y_train = y_scaler.fit_transform(y_train)
X_test = X_scaler.transform(X_test) #同样的模型来训练转化测试数据
y_test = y_scaler.transform(y_test)