Не может импортировать ближайших соседей в scikit-learn 0.16

Question

Python 3.4.3 (v3.4.3:9b73f1c3e601, 23 февраля 2015, 02:52:03) [GCC 4.2.1 (Apple Inc., сборка 5666) (точка 3)] на darwin Тип "help", "copyright", " кредиты "или" лицензия "для получения дополнительной информации.

import sklearn
sklearn.__version__
'0.16.1'
from sklearn.neighbors import NearestNeighbors

Traceback (most recent call last):   File "<stdin>", line 1, in <module>   File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/sklearn/neighbors/__init__.py", line 9, in <module>
    from .graph import kneighbors_graph, radius_neighbors_graph   File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/sklearn/neighbors/graph.py", line 9, in <module>
    from .base import KNeighborsMixin, RadiusNeighborsMixin   File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/sklearn/neighbors/base.py", line 18, in <module>
    from ..metrics import pairwise_distances   File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/sklearn/metrics/__init__.py", line 15, in <module>
    from .classification import accuracy_score   File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/sklearn/metrics/classification.py", line 31, in <module>
    from ..preprocessing import LabelBinarizer, label_binarize   File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/sklearn/preprocessing/__init__.py", line 25, in <module>
    from ._weights import balance_weights ImportError: cannot import name 'balance_weights'