ModuleNotFoundError：没有名为“sklearn.utils._joblib”的模块

Question

我在 Anaconda Jupyter 笔记本平台上使用 python 3.6。我的电脑使用 win 8.1 作为操作系统。

我试图使用以下几行从 sklearn 导入 PCA：

import sklearn
from sklearn import decomposition 
from sklearn.decomposition import PCA 

第三行返回模块错误： ModuleNotFoundError: No module named 'sklearn.utils._joblib'

奇怪的是，我在网上找不到有关此错误的任何记录！我很感激任何帮助。我复制了以下完整的错误消息：

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-375-2e95ea83a366> in <module>()
      1 import sklearn
----> 2 from sklearn import decomposition
      3 from sklearn.decomposition import PCA
      4 # Make an instance of the Model
      5 pca = PCA(.95)

E:\Anaconda3\lib\site-packages\sklearn\decomposition\__init__.py in <module>()
      9 from .incremental_pca import IncrementalPCA
     10 from .kernel_pca import KernelPCA
---> 11 from .sparse_pca import SparsePCA, MiniBatchSparsePCA
     12 from .truncated_svd import TruncatedSVD
     13 from .fastica_ import FastICA, fastica

E:\Anaconda3\lib\site-packages\sklearn\decomposition\sparse_pca.py in <module>()
     11 from ..linear_model import ridge_regression
     12 from ..base import BaseEstimator, TransformerMixin
---> 13 from .dict_learning import dict_learning, dict_learning_online
     14 
     15 

E:\Anaconda3\lib\site-packages\sklearn\decomposition\dict_learning.py in <module>()
     15 
     16 from ..base import BaseEstimator, TransformerMixin
---> 17 from ..utils._joblib import Parallel, delayed, effective_n_jobs
     18 from ..externals.six.moves import zip
     19 from ..utils import (check_array, check_random_state, gen_even_slices,

ModuleNotFoundError: No module named 'sklearn.utils._joblib'

Answer 1

直接安装并导入joblib：

!pip install joblib
import joblib