def __init__(self, **kwargs): super(LoginScreen, self).__init__(**kwargs) layout = GridLayout() layout.cols = 2 layout.spacing = 50 layout.row_default_height = window_height layout.col_default_width = window_width / 10 layout.add_widget(Label(text='Observer')) layout.observer_field = TextInput(multiline=False) layout.add_widget(layout.observer_field) layout.add_widget(Label(text='Box open')) layout.box_open_field = TextInput(box_open_field=True, multiline=False) layout.add_widget(layout.box_open_field) self.layout = layout self.add_widget(layout)