ImportError No module named model selection

Question

I am trying to use train test split function and write   from sklearn model selection import train test split   and this causes   ImportError  No module named model selection   Why  And how to overcome

User · Answer

I had the same problem while using Jupyter Notebook, no matter what I updated in Python 3, conda, I could not get in Jupyter:

import sklearn
print (sklearn.__version__)
0.17.1

to SHOW scikit-learn-0.18.1

Finally, I removed Anaconda3 and Jupyter Notebook and reinstalled fresh. I got it to work.

http://ukitech.blogspot.com/2017/02/sklearnmodelselection.html

User · Answer

I guess you have the wrong version of scikit-learn  a similar situation was described here on GitHub  Previously  before v0 18   train test split was located in the cross validation module   from sklearn cross validation import train test split   However  now it s in the model selection module   from sklearn model selection import train test split   so you ll need the newest version   To upgrade to at least version 0 18  do   pip install -U scikit-learn    Or pip3  depending on your version of Python   If you ve installed it in a different way  make sure you use another method to update  for example when using Anaconda

User · Answer

In Late September 2016  SciKit Learn 0 18 was released and there was a slight change to the code  With  SciKit Learn 0 18 the train test split function is now imported from model selection instead of cross validation   from sklearn cross validation import train test split   has been changed to    from sklearn model selection import train test split   The same has also happened for GridSearchCV

User · Answer

To install scikit-learn version 18 0  I used both commands   conda update scikit-learn  pip install -U scikit-learn  But it does not work  There was a problem  Cannot install  scikit-learn   It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall    Finally  i can install it by using following command   pip install --user --upgrade scikit-learn  0 18 0

User · Answer

Update sklearn     conda update scikit-learn

User · Answer

do you have sklearn  if not  do the following   sudo pip install sklearn   After installing sklearn  from sklearn model selection import train test split   works fine

User · Answer

As  linusg said  one option is just import crossvalidation as follows   from sklearn import cross validation X train X test y train y test   cross validation train test split X y test size 0 3

User · Answer

Latest Stable release of sklearn 0 20 0 has train test split is under model selection not under cross validation  In order to check your sklearn version    import sklearn print  sklearn version  0 20 2

User · Answer

Your sklearn version is too low  model selection is imported by 0 18 1  so please update the sklearn version

User · Answer

I encountered this problem when I import GridSearchCV   Just changed sklearn model selection to sklearn grid search

User · Answer

Adding some info to the previous answer from  linusg    sklearn keeps a release history of all its changes  Think of checking it from time to time  Here is the link to the documentation   As you can see in the documentation for the version 0 18  a new module was created called model selection  Therefore it didn t exist in previous versions   Update sklearn and it will work

[python] ImportError: No module named model_selection

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