title: lxml runtime error: Reason: Incompatible library version: etree.so requires version 12.0.0 or later, but libxml2.2.dylib provides version 10.0.0
body: <p>I have a perplexing problem.
  I have used mac version 10.9, anaconda 3.4.1, python 2.7.6.</p>
  
  <p>Developing web application with python-amazon-product-api. i have overcome an obstacle about installing lxml, referencing <a href="https://stackoverflow.com/questions/22313407/clang-error-unknown-argument-mno-fused-madd-python-package-installation-fa/22372751#22372751">clang error: unknown argument: &#39;-mno-fused-madd&#39; (python package installation failure)</a>.</p>
  
  <p>but another runtime error happened.
  Here is the output from webbrowser.</p>
  
  <pre><code>Exception Type: ImportError
  Exception Value:    
  dlopen(/Users/User_Name/Documents/App_Name/lib/python2.7/site-packages/lxml/etree.so, 2): Library not loaded: libxml2.2.dylib
  Referenced from: /Users/User_Name/Documents/App_Name/lib/python2.7/site-packages/lxml/etree.so
  Reason: Incompatible library version: etree.so requires version 12.0.0 or later, but libxml2.2.dylib provides version 10.0.0
  </code></pre>
  
  <p>Not sure how to proceed and have searched here and elsewhere for this particular error. Any help is much appreciated!</p>