AttributeError:类型对象'sklearn.tree._criterion.array‘没有特性'__reduce_cython__’

Question

我想在jupyter中导入from sklearn.tree import DecisionTreeRegressor。但是，当我运行只包含上面的import行时，我得到了这个错误。

<ipython-input-16-28b3e81cd98d> in <module>
----> 1 from sklearn.tree import DecisionTreeRegressor

~/.local/lib/python3.6/site-packages/sklearn/tree/__init__.py in <module>
      4 """
      5 
----> 6 from ._classes import BaseDecisionTree
      7 from ._classes import DecisionTreeClassifier
      8 from ._classes import DecisionTreeRegressor

~/.local/lib/python3.6/site-packages/sklearn/tree/_classes.py in <module>
     38 from ..utils.validation import check_is_fitted
     39 
---> 40 from ._criterion import Criterion
     41 from ._splitter import Splitter
     42 from ._tree import DepthFirstTreeBuilder

~/.local/lib/python3.6/site-packages/sklearn/tree/_criterion.cpython-36m-x86_64-linux-gnu.so in init sklearn.tree._criterion()

AttributeError: type object 'sklearn.tree._criterion.array' has no attribute '__reduce_cython__'

我试着安装scipy并更新scikit-learn by conda，但是没有解决。

Answer 1

尝试更新Cython：

pip install cython