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

Answer 1

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)