title: python - importing parent dir issues
body: <p>I created with virtualenv a Foo project and I've some problem with importing the File module in test_file.py</p>
  
  <p>This is my project directory</p>
  
  <pre><code>Foo/
  ├── app
  │   ├── __init__.py
  │   ├── testfile.py
  │   ├── tests
  │   │   ├── __init__.py
  │   │   └── test_gram.py
  │   ├── util
  │   │   ├── File.py
  │   │   ├── Gram.py
  │   │   ├── __init__.py
  └── NOTES
  </code></pre>
  
  <p>test_gram.py:</p>
  
  <pre><code>from app.util.File import loadDataFromPickle
  
  listofdict = loadDataFromPickle(".....")
  i = 0
  for item in listofdict[:50]:
      print(item)
  </code></pre>
  
  <p>If I run test_gram, I am getting a ImportError:</p>
  
  <pre><code>Traceback (most recent call last):
    File "test_gram.py", line 1, in &lt;module&gt;
      from app.util.File import loadDataFromPickle
  ImportError: No module named 'app
  </code></pre>
  
  <p>What am I doing wrong? Do I need to change the virtualenv-path to Foo/app instead of Foo?</p>