title: How to Fix Python Nose: Coverage not available: unable to import coverage module
body: <p>I can't seem to get code coverage with Nose to work, despite having the plugin installed.</p>
  
  <p>Any ideas on how to fix this?</p>
  
  <pre><code>12:15:25 ~/sandbox/ec$ nosetests --plugins
  Plugin xunit
  Plugin deprecated
  Plugin skip
  Plugin multiprocess
  Plugin failuredetail
  Plugin capture
  Plugin logcapture
  Plugin coverage
  Plugin attributeselector
  Plugin doctest
  Plugin profile
  Plugin id
  Plugin allmodules
  Plugin collect-only
  Plugin isolation
  Plugin pdb
  
  12:15:34 ~/sandbox/ec$ nosetests -v --with-coverage
  nose.plugins.cover: ERROR: Coverage not available: unable to import coverage module
  tests.edgecast_client_tests.test_log ... ok
  
  ----------------------------------------------------------------------
  Ran 1 test in 0.206s
  
  OK
  </code></pre>