title: Importing flask.ext.wtf
body: <p>I am using venv, and I develop using eclipse .
  I want to add a contact page . </p>
  
  <p>I did : </p>
  
  <pre><code>$ . bin/activate
  $ pip install flask-wtf
  </code></pre>
  
  <p>And I import some modules in the forms.py :</p>
  
  <p>I used this : </p>
  
  <pre><code>from flask.ext.wtf import Form, TextField, TextAreaField, SubmitField
  </code></pre>
  
  <p>and then this :</p>
  
  <pre><code>from flask.ext.wtf import Form
  from wtforms.fields import TextField, BooleanField
  </code></pre>
  
  <p>No one of them worked because I had this error : </p>
  
  <pre><code>from flask.ext.wtf import Form
    File "/usr/local/lib/python2.7/dist-packages/flask/exthook.py", line 87, in load_module
      raise ImportError('No module named %s' % fullname)
  ImportError: No module named flask.ext.wtf
  </code></pre>