ImportError: cannot import name 'cross_validate'

Question

I'm trying to do:

from sklearn.model_selection import cross_validate

as mentioned here. But get the error:

ImportError: cannot import name 'cross_validate'

Everything else in Sklearn seems to work fine, it's just this bit. Error even occurs when I run this one line and nothing else.

Answer 1

cross-validate是版本0.19.0（change log）中的新内容：

  

交叉验证现在能够从多个结果返回结果   指标评估。新的model_selection.cross_validate可以返回   测试数据以及训练集性能和评分   时间安排，我们已经扩展了评分和改装参数   网格/随机搜索来处理多个指标。

如果您使用conda或conda upgrade scikit-learn，为了使用它，请使用pip install --upgrade scikit-learn更新您的scikit-learn安装。如果无法更新，您仍然可以使用cross_val_score。

Answer 2

在最新的稳定版本0.20.0上，它位于model_selection下。

from sklearn.model_selection import train_test_split

引用Documentation

Answer 3

从sklearn.model_selection导入cross_validate