ModuleNotFoundError：沒有名為“sklearn.grid_search”的模塊

Question

我正在做一個圖像檢測問題，但是在導入RandomizedSearchCV時出現了一些錯誤。

我已經安裝：

pip3 install scikit-learn
pip3 install scikit-image

我首先嘗試了這段代碼：

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

它起作用了，之后，我像這樣導入RandomizedSearchCV ，並顯示錯誤。

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，這些模塊現在位於sklearn.model_selection下，而不再位於sklearn.grid_search下，並且train_test_split （ docs ）也是如此。 因此，您應該將進口更改為：

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

或更簡潔

from sklearn.model_selection import RandomizedSearchCV, GridSearchCV, train_test_split

Answer 2

model_selection 已經取代了 grid_search 和 cross_validation