python-3.x - SciKit-Learn 的分解模块中未安装 LatentDirichletAllocation

Question

我在 SciKit-Learn 包中遇到了一些奇怪的问题。SciKit-Learn 包中有“分解”模块，其中应该包含 LatentDirichletAllocation([…]) 函数。请参阅此处的文档:"https://scikit-learn.org/stable/modules/classes.html#module-sklearn.decomposition "

当我尝试导入“分解”模块时:从 sklearn 导入为分解它给出了错误:

Traceback (most recent call last):
  File "tf_1_day_scikit_dnn.py", line 12, in <module>
    from sklearn import decomposition
  File "/home/developer1/.local/lib/python3.6/site-packages/sklearn/decomposition/__init__.py", line 19, in <module>
    from ._online_lda import LatentDirichletAllocation
ImportError: cannot import name 'LatentDirichletAllocation'

命令:ls -al ~/.local/lib/python3.6/site-packages/sklearn/decomposition 显示:

drwxr-xr-x  4 developer1 developer1   4096 Dec  9 00:45 .
drwxr-xr-x 33 developer1 developer1   4096 Dec  9 00:45 ..
-rw-r--r--  1 developer1 developer1   5490 Dec  9 00:44 _base.py
-rw-r--r--  1 developer1 developer1    480 Dec  9 00:44 base.py
-rwxr-xr-x  1 developer1 developer1 179440 Dec  9 00:44 _cdnmf_fast.cpython-36m-x86_64-linux-gnu.so
-rwxr-xr-x  1 developer1 developer1 175344 Dec  3 00:09 cdnmf_fast.cpython-36m-x86_64-linux-gnu.so
-rw-r--r--  1 developer1 developer1    498 Dec  9 00:44 cdnmf_fast.py
-rw-r--r--  1 developer1 developer1  54528 Dec  9 00:44 _dict_learning.py
-rw-r--r--  1 developer1 developer1    507 Dec  9 00:44 dict_learning.py
-rw-r--r--  1 developer1 developer1  12572 Dec  9 00:44 _factor_analysis.py
-rw-r--r--  1 developer1 developer1    513 Dec  9 00:44 factor_analysis.py
-rw-r--r--  1 developer1 developer1  20866 Dec  9 00:44 _fastica.py
-rw-r--r--  1 developer1 developer1    490 Dec  9 00:44 fastica_.py
-rw-r--r--  1 developer1 developer1  14076 Dec  9 00:44 _incremental_pca.py
-rw-r--r--  1 developer1 developer1    513 Dec  9 00:44 incremental_pca.py
-rw-r--r--  1 developer1 developer1   1401 Dec  9 00:44 __init__.py
-rw-r--r--  1 developer1 developer1  13597 Dec  9 00:44 _kernel_pca.py
-rw-r--r--  1 developer1 developer1    498 Dec  9 00:44 kernel_pca.py
-rw-r--r--  1 developer1 developer1  47255 Dec  9 00:44 _nmf.py
-rw-r--r--  1 developer1 developer1    477 Dec  9 00:44 nmf.py
-rwxr-xr-x  1 developer1 developer1  62056 Dec  3 00:09 _online_lda.cpython-36m-x86_64-linux-gnu.so
-rwxr-xr-x  1 developer1 developer1  62064 Dec  9 00:44 _online_lda_fast.cpython-36m-x86_64-linux-gnu.so
-rw-r--r--  1 developer1 developer1    513 Dec  9 00:44 online_lda_fast.py
-rw-r--r--  1 developer1 developer1  30471 Dec  9 00:44 _online_lda.py
-rw-r--r--  1 developer1 developer1    498 Dec  9 00:44 online_lda.py
-rw-r--r--  1 developer1 developer1  22807 Dec  9 00:44 _pca.py
-rw-r--r--  1 developer1 developer1    477 Dec  9 00:44 pca.py
drwxr-xr-x  2 developer1 developer1   4096 Dec  9 00:45 __pycache__
-rw-r--r--  1 developer1 developer1    855 Dec  9 00:44 setup.py
-rw-r--r--  1 developer1 developer1  13654 Dec  9 00:44 _sparse_pca.py
-rw-r--r--  1 developer1 developer1    498 Dec  9 00:44 sparse_pca.py
drwxr-xr-x  3 developer1 developer1   4096 Dec  9 00:45 tests
-rw-r--r--  1 developer1 developer1   8346 Dec  9 00:44 _truncated_svd.py
-rw-r--r--  1 developer1 developer1    507 Dec  9 00:44 truncated_svd.py

大部分函数都在这里，但没有“LatentDirichletAllocation”函数的踪迹。然而，我确实在 _online_lda.py 文件中看到了 LatentDirichletAllocation 类的定义。

命令 python3 -c "import sklearn; sklearn.show_versions()" 打印所有需要的版本:

System:
    python: 3.6.8 (default, Oct  7 2019, 12:59:55)  [GCC 8.3.0]
executable: /usr/bin/python3
   machine: Linux-4.15.0-65-generic-x86_64-with-Ubuntu-18.04-bionic

Python dependencies:
       pip: 9.0.1
setuptools: 42.0.2
   sklearn: 0.22
     numpy: 1.17.4
     scipy: 1.3.3
    Cython: None
    pandas: 0.25.3
matplotlib: 3.1.2
    joblib: 0.14.0

Built with OpenMP: True

所以我假设这里满足了所有要求。 (顺便说一句，在我尝试导入“分解”模块之前，SciKit-Learn 工作正常)。

我按照此处的描述安装了 SciKit-Learn 包:“https://scikit-learn.org/stable/install.html”使用命令 pip3 install -U scikit-learn我确实重新安装了几次，但得到了相同的结果。

我做错了什么？我是否需要将缺少的“LatentDirichletAllocation”函数添加到“分解”模块中？如果是这样 - 怎么样？我应该以不同的方式安装整个软件包吗？

谢谢。

Answer 1

我今天遇到了同样的问题。我通过回到以前的 scikit-learn 0.21 版本解决了这个问题:

pip3 install scikit-learn==0.21

编辑:我认为来自 glemaitre ( https://stackoverflow.com/a/59328446/10429267 ) 的答案显示了更好的解决方案。