title: ImportError numpy/core/multiarray.so: undefined symbol: PyUnicodeUCS2_AsASCIIString
body: <p>When I run django project, I came across a strange problem as listed:</p>
  
  <pre><code>ImportError: /usr/local/lib/python2.7/site-packages/numpy/core/multiarray.so: undefined symbol: PyUnicodeUCS2_AsASCIIString
  </code></pre>
  
  <p>If I I run this project in dev mode(python manage.py runserver 0.0.0.0:8000), it doesn't occur. But when I deploy this project in apache and then this problem occurs.</p>
  
  <p>In this project, I use nltk package and mongodb, and numpy is a dependency. 
    My OS is CentOS 6.3 and I upgraded python from 2.6.6 to 2.7.3 which is compiled by myself.</p>
  
  <p>Following some instructions, I recompile and rebuild python with ./configure --enable-unicode=ucs2. But that seems didn't work.</p>
  
  <p>So any guys know the reason or solutions? Thanks a lot!</p>