Fixing Exception

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\gooey\gui\footer.py", line 152, in OnStart
Button
    self._controller.OnStartButton(event, self)
  File "C:\Python27\lib\site-packages\gooey\gui\controller.py", line 52, in OnSt
artButton
    cmd_line_args = self._base.GetOptions()
  File "C:\Python27\lib\site-packages\gooey\gui\base_window.py", line 94, in Get
Options
    return self.config_panel.GetOptions()
  File "C:\Python27\lib\site-packages\gooey\gui\advanced_config.py", line 104, i
n GetOptions
    if c.GetValue() is not None]
  File "C:\Python27\lib\site-packages\gooey\gui\components.py", line 181, in Get
Value
    [self._action.option_strings[0],  # get the verbose copy if available
IndexError: list index out of range

gooey/gui/components.py

@@ -178,7 +178,7 @@ class Choice(AbstractComponent):
     if self._widget.GetValue() == self._DEFAULT_VALUE:
       return None
     return ' '.join(
-      [self._action.option_strings[0],  # get the verbose copy if available
+      [self._action.option_strings[0] if self._action.option_strings else '',  # get the verbose copy if available
        self._widget.GetValue()])
 
   def BuildInputWidget(self, parent, action):