title: Pyforms AttributeError: ‘module’ object has no attribute ‘start_app’
body: <p>After installing pyforms on my Raspberry Pi 3 i tried running the example i found on <a href="http://pyforms.readthedocs.io/en/v2.0/getting-started/the-basic/#the-basic" rel="nofollow noreferrer">readthedocs</a>, but the application is throwing an <code>AttributeError</code> (I tried both python2 and python3)</p>
  
  <hr>
  
  <p><strong>Python Code</strong></p>
  
  <pre><code>import pyforms
  from   pyforms          import BaseWidget
  from   pyforms.Controls import ControlText
  from   pyforms.Controls import ControlButton
  
  class SimpleExample1(BaseWidget):
  
      def __init__(self):
          super(SimpleExample1,self).__init__('Simple example 1')
  
          #Definition of the forms fields
          self._firstname     = ControlText('First name', 'Default value')
          self._middlename    = ControlText('Middle name')
          self._lastname      = ControlText('Lastname name')
          self._fullname      = ControlText('Full name')
          self._button        = ControlButton('Press this button')
  
  
  #Execute the application
  if __name__ == "__main__":   pyforms.start_app( SimpleExample1 )
  </code></pre>
  
  <hr>
  
  <p><strong>Error:</strong></p>
  
  <pre><code>Traceback (most recent call last):
    File "PiControl.py", line 20, in &lt;module&gt;
      if __name__ == "__main__":   pyforms.start_app( SimpleExample1 )
  AttributeError: ‘module’ object has no attribute ‘start_app’
  </code></pre>
  
  <hr>
  
  <hr>
  
  <p><strong>Edit:</strong></p>
  
  <p>I tried to import <code>start_app</code> manually with </p>
  
  <pre><code>from pyforms.gui.standaloneManager import start_app
  </code></pre>
  
  <p>but then I get another <code>ImportError</code>:</p>
  
  <pre><code>Traceback (most recent call last):
    File "PiControl.py", line 4, in &lt;module&gt;
      from   pyforms.gui.standaloneManager import start_app
  ImportError: cannot import name 'start_app'
  </code></pre>