keras_network: problems with dropout layers

[krumnack]

when requesting the layer_weights of a dropout layer, the method get_weights() throws an IndexError: list index out of range. Pressing the "Dropout" Button in the Network widget results in:

  File "/net/store/cv/users/krumnack/projects/github/qtpyvis/qtgui/panels/activations.py", line 186, in setLayer
    self.networkinfo.setLayer(self.layer)
  File "/net/store/cv/users/krumnack/projects/github/qtpyvis/qtgui/widgets/networkview.py", line 193, in setLayer
    self.layerText += self._layerInfoString(self.layer_id)
  File "/net/store/cv/users/krumnack/projects/github/qtpyvis/qtgui/widgets/networkview.py", line 211, in _layerInfoString
    if self.network.layer_is_convolutional(layer_id):
  File "/net/store/cv/users/krumnack/projects/github/qtpyvis/network/network.py", line 110, in layer_is_convolutional
    layer_shape = self._get_layer_weights_shape(layer_id)
  File "/net/store/cv/users/krumnack/projects/github/qtpyvis/network/network.py", line 176, in _get_layer_weights_shape
    weights = self.get_layer_weights(layer_id)
  File "/net/store/cv/users/krumnack/projects/github/qtpyvis/network/keras_network.py", line 82, in get_layer_weights
    return self._model.get_layer(layer_id).get_weights()[0]
IndexError: list index out of range
Aborted