title: Clear valid form after it is submitted
body: <p>I want to reset the form after it validates.  Currently the form will still show the previous data after it is submitted and valid.  Basically, I want the form to go back to the original state with all fields clean.  What is the correct to do this?</p>
  
  <pre><code>@mod.route('/', methods=['GET', 'POST'])
  def home():
      form = NewRegistration()
  
      if form.validate_on_submit():
          #save in db
  
          flash(gettext(u'Thanks for the registration.'))
  
      return render_template("users/registration.html", form=form)
  </code></pre>