title: Python cannot find package setuptools
body: <p>I get the error</p>
  
  <pre><code>Could not import setuptools which is required to install from a source distribution.
  Traceback (most recent call last):
  File "/home/comp1/anaconda3/lib/python3.5/site-packages/pip/req/req_install.py", line 387, in setup_py
  import setuptools  # noqa
  File "/home/comp1/anaconda3/lib/python3.5/site-packages/setuptools/__init__.py", line 10, in &lt;module&gt;
  from setuptools.extern.six.moves import filter, filterfalse, map
  ImportError: No module named 'setuptools.extern.six'
  </code></pre>
  
  <p>even though the same code runs perfectly on a variety of our computers. I do have setuptools installed. I also tried to remove and reinstall it. </p>
  
  <p>EDIT: For some reason, now it works. I don't think we can call it solved, because I did not do anything, but I also don't have the issue anymore. </p>