title: error using ete3 in python: 'No module name cPickle'
body: <p>I'm having a problem similar to:
  <a href="https://stackoverflow.com/questions/32679476/theano-import-error-no-module-named-cpickle">Theano import error: No module named cPickle</a></p>
  
  <p>But with using ete3 (www.etetoolkit.org). I downgraded to ete2 and the problem disappeared, but would like to be using the functionality in ete3.</p>
  
  <p>Following after the comments in the related stackoverflow post above, i've upgraded to the newest version of 'six' (1.10.0), but still have this error message:</p>
  
  <pre><code>Traceback (most recent call last):
    File "treebuilder.py", line 7, in &lt;module&gt;
      from ete3 import *
    File "/Library/Python/2.7/site-packages/ete3/__init__.py", line 56, in &lt;module&gt;
      from .webplugin.webapp import *
    File "/Library/Python/2.7/site-packages/ete3/webplugin/webapp.py", line 46, in &lt;module&gt;
      import six.moves.cPickle
  ImportError: No module named cPickle
  </code></pre>
  
  <p>and, when I try to install cPickle (using sudo and -H), I get:</p>
  
  <pre><code>Collecting cPickle
  /Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
    InsecurePlatformWarning
    Could not find a version that satisfies the requirement cPickle (from versions: )
  No matching distribution found for cPickle
  /Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
    InsecurePlatformWarning
  </code></pre>
  
  <p>How could I resolve this problem?</p>