title: Python/PyCharm: sys.path "lib" not the same capitalization as venv's "Lib"?
body: <ol>
  <li>I cloned a Python 2 project and used PyCharm to create a Python 2.7.12 virtualenv.</li>
  <li>I am now getting an "ImportError" when I try to run the code.</li>
  <li>While debugging I noticed that if I start the virtualenv and run the version of Python it contains, and then check the Path that is checked for modules, the "lib" is not capitalized (see second red arrow below).</li>
  <li>However, in my venv folder, "Lib" <em>is</em> capitalized.</li>
  </ol>
  
  <p>Is this OK?</p>
  
  <p><a href="https://i.stack.imgur.com/6Z0k1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6Z0k1.png" alt="enter image description here"></a></p>
  
  <hr>
  
  <p>Below is a screenshot of the traceback I'm getting. The first module imported is always not being found. If I start an interactive session using the venv I'm able to import all of the modules.  Even more strangely, if I create a <em>new</em> file and try to run it with just an import in it (say, 'test.py'), the traceback shows an error in the <em>original</em> file (site.py).</p>
  
  <p><a href="https://i.stack.imgur.com/eJWHl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eJWHl.png" alt="enter image description here"></a></p>
  
  <hr>
  
  <p>I pulled <code>site.py</code> into a new project and it seems that it is the actual name of the file as <code>site</code> that is causing the error:</p>
  
  <p>Doesn't work:</p>
  
  <p><a href="https://i.stack.imgur.com/o2K7F.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/o2K7F.png" alt="enter image description here"></a></p>
  
  <p>Does work:</p>
  
  <p><a href="https://i.stack.imgur.com/V2Ghc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/V2Ghc.png" alt="enter image description here"></a></p>