title: Flask extensions IN PyCharm
body: <p>I'm actually having trouble using the <code>flask.ext</code> with PyCharm ide. I installed the flask-script and flask-bootstrap but the Pycharm is unable to recognize them. I'm getting the following error.</p>
  
  <pre><code>Traceback (most recent call last):
  File "/home/brucewilson/PycharmProjects/demo_proj/demo.prj.py", line 5, in &lt;module&gt;
  from flask.ext.bootstrap import Bootstrap
  File "/home/brucewilson/flasky/venv/local/lib/python2.7/site-packages/flask/exthook.py", line 87, in load_module
  raise ImportError('No module named %s' % fullname)
  ImportError: No module named flask.ext.bootstrap
  </code></pre>