title: python import module failed
body: <p>I'm getting crazy with this one (windows7 x64 python 2.6.6):</p>
  
  <pre><code>    from abcutils import Path, CMakeCache
  ImportError: No module named abcutils
  </code></pre>
  
  <p>This is the excerpt from python file I'm executing:</p>
  
  <pre><code>__self_dir = os.path.split( sys.argv[0] )[0]
  __alembic_python_dir = os.path.normpath( os.path.join( __self_dir, os.pardir,
                                                         os.pardir,
                                                         "lib", "python" ) )
  sys.path.insert( 0, __alembic_python_dir )
  from abcutils import Path, CMakeCache
  </code></pre>
  
  <p>The code is correct and everything including <code>__init__.py</code> is in <code>lib\python\abcutils</code> folder, and best of all everything used to work until suddenly.</p>
  
  <p>Hope anyone has any ideas?</p>
  
  <p>Thanks</p>