title: ImportError with scipy/sklearn: `/usr/lib/liblapack.so.3gf: undefined symbol: ATL_chemv`
body: <p>My code worked fine in Ubuntu 12.04, but now I have error:</p>
  
  <pre>
    from sklearn.metrics import accuracy_score   File "/usr/local/lib/python2.7/dist-packages/sklearn/metrics/__init__.py", line 6, in 
      from .metrics import (accuracy_score,   File "/usr/local/lib/python2.7/dist-packages/sklearn/metrics/metrics.py", line 25, in 
      from scipy.spatial.distance import hamming as sp_hamming   File "/usr/local/lib/python2.7/dist-packages/scipy/spatial/__init__.py", line 91, in 
      from .qhull import *  ImportError: /usr/lib/liblapack.so.3gf: undefined symbol: ATL_chemv
  </pre>
  
  <p>I don't understand what does this error mean and what should I do.</p>