Using Python 2.7 with scikit-learn 0.14 package. It runs well on some examples from the user guild expect the Linear Models.
Traceback (most recent call last
same problem happened with can not import _safe_split, have a look
http://stackoverflow.com/questions/41024001/importerror-cannot-import-name-safe-split
https://github.com/scikit-learn/scikit-learn/issues/7582
EDIT: check comment by Andreas Mueller