title: Error importing scipy.sparse._sparsetools
body: <p>I'm working on a macbook pro trying to use the gensim package to do Word2Vec.  I had used the model earlier in the week, but when I tried to resume using it, I was given an error regarding loading scipy.  I tried loading only the specific model echoing the error message, and this is the same output:</p>
  
  <pre><code>&gt;&gt;&gt; import scipy.sparse._sparsetools
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "//anaconda/lib/python2.7/site-packages/scipy/sparse/__init__.py", line 213, in &lt;module&gt;
      from .csr import *
    File "//anaconda/lib/python2.7/site-packages/scipy/sparse/csr.py", line 13, in &lt;module&gt;
      from ._sparsetools import csr_tocsc, csr_tobsr, csr_count_blocks, \
  ImportError: dlopen(//anaconda/lib/python2.7/site-packages/scipy/sparse/_sparsetools.so, 2): Symbol not found: __ZNSs4_Rep20_S_empty_rep_storageE
    Referenced from: //anaconda/lib/python2.7/site-packages/scipy/sparse/_sparsetools.so
    Expected in: dynamic lookup
  </code></pre>
  
  <p>I intall everything via pip, so nothing was specifically built on this mac.  Any advice would be most appreciated.</p>
  
  <p>System details:</p>
  
  <ul>
  <li>Python 2.7.8 |Anaconda 2.1.0 (x86_64)| (default, Aug 21 2014, 15:21:46)</li>
  <li>Mac OSX, Yosemite (10.10.5)</li>
  <li>scipy 0.14.0</li>
  </ul>