当试图使用explained_variance_ratio_属性sklearn.decomposition.PCA识别dataset的前两列所解释的方差时,我会收到以下错误:我的代码(浓缩):from sklearn.preprocessing import StandardScaler
from sklearn.decompositionAttributeError: 'PCA' object has
X,y)ImportError: cannot import name 'LatentDirichletAllocation' from 'sklearn.decomposition_online_lda' (C:\Users\lenovo\Anaconda3\lib\site-packages\sklearn\decomposition_online_lda.cp37-win_amd64