title: PyDev Undefined variable from import error
body: <p>I'm using virtualenv for Django project. From command line I can import modules hashlib and zipfile. But PyDev is reporting unresolved import for those two. (os, sys and email are working).</p>
  
  <p>When I copy zipfile.py and zipfile.pyc (and same for hashlib) to virtualenv lib's folder I can import modules, but I get errors that md5 variable isn't defined in hashlib and so on. Again, I can call md5 method within virtualenv in command line...</p>
  
  <p>What Can I do?</p>