ModuleNotFoundError：没有名为“sklearn.grid_search”的模块

Question

我正在做一个图像检测问题，但是在导入RandomizedSearchCV时出现了一些错误。

我已经安装：

pip3 install scikit-learn
pip3 install scikit-image

我首先尝试了这段代码：

from sklearn.neighbors import KNeighborsClassifier
from sklearn.model_selection import GridSearchCV

它起作用了，之后，我像这样导入RandomizedSearchCV ，并显示错误。

from sklearn.grid_search import RandomizedSearchCV
from sklearn.grid_search import GridSearchCV
from sklaern.cross_validation import train_test_split


---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-11-9f5ecfd22091> in <module>
----> 1 from sklearn.grid_search import RandomizedSearchCV
      2 from sklearn.grid_search import GridSearchCV
      3 from sklaern.cross_validation import train_test_split

ModuleNotFoundError: No module named 'sklearn.grid_search'

 >>> import sklearn
>>> sklearn.__version__
'0.20.3'

Answer 1

在最新版本中，这些模块现在位于sklearn.model_selection下，而不再位于sklearn.grid_search下，并且train_test_split （ docs ）也是如此。 因此，您应该将进口更改为：

from sklearn.model_selection import RandomizedSearchCV
from sklearn.model_selection import GridSearchCV
from sklearn.model_selection import train_test_split

或更简洁

from sklearn.model_selection import RandomizedSearchCV, GridSearchCV, train_test_split

Answer 2

model_selection 已经取代了 grid_search 和 cross_validation