I just started developing my first app in python using kivy. I generated the general layout of the app and also some logic in an python file in addition to my main py to seperate everything a bit. This worked perfectly fine and the app was running without any issues. I wanted to add some screens when hitting buttons that provide extra information. Managed to do so, but now the app crashes when hitting the buttons that worked before adding the extra screens. Those buttons use classes that aren't implemented in the main.py but in a side file. Like I explained, they worked before adding the ScreenManager. here's the short version of the error I get: AttributeError: 'super' object has no attribute '__getattr__'
Main.py: peenomat.py
import kivy
# -*- coding: iso-8859-1 -*-
from kivy.app import App
from kivy.uix.button import Label
from kivy.uix.widget import Widget
from kivy.uix.textinput import TextInput
from kivy.lang import Builder
from kivy.uix.anchorlayout import AnchorLayout
from kivy.core.text import LabelBase
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import BooleanProperty
from kivy.properties import ObjectProperty
from kivy.config import Config
Builder.load_file('Header.kv')
Builder.load_file('Statusbar.kv')
Builder.load_file('Inputparameters.kv')
Builder.load_file('Outputparameters.kv')
Builder.load_file('Extra.kv')
#loading main kv
Builder.load_file('peenomat.kv')
class Peenomat(Screen):
pass
class Instruction(Screen):
pass
class Additional(Screen):
pass
# Create the screen manager
sm = ScreenManager()
sm.add_widget(Peenomat(name='peenomat'))
sm.add_widget(Instruction(name='instruction'))
sm.add_widget(Additional(name='additional'))
class PeenomatApp(App):
def build(self):
self.icon = 'icon.png'
#return pm
return sm
#return Peenomat()
if __name__=="__main__":
PeenomatApp().run()
the main kv.file: peenomat.kv
<Peenomat>
AnchorLayout:
anchor_x: 'left'
anchor_y: 'bottom'
GridLayout:
cols: 1
InputParameters:
id:_input_parameters
StatusBar:
id:_status_bar
<Instruction>:
AnchorLayout:
anchor_x: 'left'
anchor_y: 'bottom'
GridLayout:
cols: 1
canvas.before:
Label:
text:
Button:
text:
on_release:
app.root.current = "peenomat"
app.root.transition.direction = "up"
<Additional>:
AnchorLayout:
anchor_x: 'left'
anchor_y: 'bottom'
GridLayout:
cols: 1
Button:
text:
on_release:
app.root.current = "peenomat"
app.root.transition.direction = "left"
the .kv file where I reference the function of the buttons: statusbar.kv
#: import statusbar StatusBar
<StatusBar@BoxLayout>
orientation:'horizontal'
padding:
spacing:
Label:
size_hint: 0.05, 1
Button:
text: 'Leeren'
on_press: root.btn_clear()
Button:
text: "Mehr"
on_release:
app.root.current = "additional"
app.root.transition.direction ="right"
Button:
text: u"Los schl\u00e4gts"
on_press: root.btn_submit()
Button:
text: "?"
on_release:
app.root.current = "instruction"
app.root.transition.direction ="down"
and finally the python file that provides the classes where i generate the functions of the buttons that now crash: StatusBAr.py
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.properties import ObjectProperty
from kivy.properties import StringProperty
from kivy.app import App
from kivy.lang import Builder
#from Inputparameters import InputParameters
ver = ''
class InputParameters(GridLayout):
verfahren =ObjectProperty(None)
def on_state(self, togglebutton):
tb = togglebutton
global ver
if tb.state == 'down':
self.verfahren = tb.text
ver = tb.text
print(self.verfahren, ver)
return self.verfahren
class StatusBar(BoxLayout):
#InputGrößen
group_mode = False
prozess = ObjectProperty(None)
vorbehandlung = ObjectProperty(None)
material = ObjectProperty(None)
haerte = ObjectProperty(None)
rauheit = ObjectProperty(None)
verfahren = ObjectProperty(None)
#OutputGrößen
frequency = StringProperty(None)
speed = StringProperty(None)
hub = StringProperty(None)
def btn_submit(self):
global ver
ip = App.get_running_app().root.ids._input_parameters
op = App.get_running_app().root.ids._output_parameters
frequenz = 0
if ip.haerte.value < 50:
op.frequency = str(180) +" Hz"
op.speed = str(2.4) +" mm/s"
op.hub = str(3.4) + " mm"
elif ip.haerte.value < 60:
op.frequency = str(200) +" Hz"
op.speed = str(3.5) + " mm/s"
op.hub = str(5.23) + " mm"
else:
op.frequency = str(220) +" Hz"
op.speed = str(1.2) + " mm/s"
op.hub = str(7.2) + " mm"
#control to see if right value is taken
print(op.frequency)
def btn_clear(self):
ip = App.get_running_app().root.ids._input_parameters
op = App.get_running_app().root.ids._output_parameters
ip.pro1.state = "normal"
ip.pro2.state = "normal"
ip.pro3.state = "normal"
ip.material.text = "Auswahl treffen"
ip.vorbehandlung.text = "Auswahl treffen"
ip.haerte.value = 55
ip.rauheit.value = 5.5
op.frequency = "---"
op.speed = "---"
op.hub = "---"
so if the buttons submit or clear are used I get the following error:
[INFO ] [Base ] Leaving application in progress...
Traceback (most recent call last):
File "kivy\properties.pyx", line 860, in kivy.properties.ObservableDict.__getattr__
KeyError: '_input_parameters'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:/Users/schum/Dokumente/TUD/Masterthesis/Peenomat.py", line 79, in <module>
PeenomatApp().run()
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\app.py", line 855, in run
runTouchApp()
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\base.py", line 504, in runTouchApp
EventLoop.window.mainloop()
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\core\window\window_sdl2.py", line 747, in mainloop
self._mainloop()
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\core\window\window_sdl2.py", line 479, in _mainloop
EventLoop.idle()
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\base.py", line 342, in idle
self.dispatch_input()
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\base.py", line 327, in dispatch_input
post_dispatch_input(*pop(0))
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\base.py", line 233, in post_dispatch_input
listener.dispatch('on_motion', etype, me)
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\core\window\__init__.py", line 1402, in on_motion
self.dispatch('on_touch_down', me)
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\core\window\__init__.py", line 1418, in on_touch_down
if w.dispatch('on_touch_down', touch):
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\screenmanager.py", line 1191, in on_touch_down
return super(ScreenManager, self).on_touch_down(touch)
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\widget.py", line 549, in on_touch_down
if child.dispatch('on_touch_down', touch):
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\relativelayout.py", line 288, in on_touch_down
ret = super(RelativeLayout, self).on_touch_down(touch)
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\widget.py", line 549, in on_touch_down
if child.dispatch('on_touch_down', touch):
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\widget.py", line 549, in on_touch_down
if child.dispatch('on_touch_down', touch):
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\widget.py", line 549, in on_touch_down
if child.dispatch('on_touch_down', touch):
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\widget.py", line 549, in on_touch_down
if child.dispatch('on_touch_down', touch):
File "kivy\_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\uix\behaviors\button.py", line 151, in on_touch_down
self.dispatch('on_press')
File "kivy\_event.pyx", line 703, in kivy._event.EventDispatcher.dispatch
File "kivy\_event.pyx", line 1214, in kivy._event.EventObservers.dispatch
File "kivy\_event.pyx", line 1098, in kivy._event.EventObservers._dispatch
File "C:\Users\schum\Dokumente\TUD\Masterthesis\venv\lib\site-packages\kivy\lang\builder.py", line 64, in custom_callback
exec(__kvlang__.co_value, idmap)
File "C:\Users\schum\Dokumente\TUD\Masterthesis\Statusbar.kv", line 38, in <module>
on_press: root.btn_submit()
File "C:\Users\schum\Dokumente\TUD\Masterthesis\StatusBar.py", line 41, in btn_submit
ip = App.get_running_app().root.ids._input_parameters
File "kivy\properties.pyx", line 863, in kivy.properties.ObservableDict.__getattr__
AttributeError: 'super' object has no attribute '__getattr__'
the function of the buttons is to get selected parameter out of this .kv.file
inputparameters.kv
#: import statusbar StatusBar
<InputParameters@GridLayout>
#Initialisierung .py zu .kv Ids
prozess: _prozess
pro1: _prozess1
pro2: _prozess2
pro3: _prozess3
vorbehandlung: _vorbehandlung
material: _material
haerte: _haerte
rauheit: _rauheit
cols: 2
padding: 25
spacing: 10
#Prozess
Label:
text:'Prozess: '
BoxLayout:
orientation: 'horizontal'
id: _prozess
ToggleButton:
id:_prozess1
text:'P-MOH'
group: "proc_group"
on_state: root.on_state(self)
ToggleButton:
id:_prozess2
text:'E-MOH'
group: "proc_group"
on_state: root.on_state(self)
ToggleButton:
id:_prozess3
text:'PE-MOH'
group: "proc_group"
on_state: root.on_state(self)
#Material
Label:
text: 'Material:'
Spinner:
id: _material
text: "Auswahl treffen"
values: ['1.2379', 'Gusseisen', 'Kautschuk', 'Carbon', 'Adamantium']
# Herstellschritte
Label:
text:'Fertigungsschritte:'
Spinner:
id: _vorbehandlung
text: "Auswahl treffen"
values: [u'Fr\u00e4sen', 'Erodieren', 'Schleifen', 'Polieren']
# Haerte
Label:
text: u"H\u00e4rte:"
BoxLayout:
orientation: 'vertical'
Label:
text: str(_haerte.value) + ' HRC'
Slider:
id: _haerte
min: 45
max: 65
step: 1
value_track: True
# Rauheit
Label:
text:'Rauheit:'
BoxLayout:
orientation: 'vertical'
Label:
text: str("%.1f" % _rauheit.value) + ' Rz' #eine Nachkommastelle
Slider:
id: _rauheit
min: 1
max: 10
value_track: True
whats weirrd is that the togglebuttons can still use the function generatet in the statusbar.py and do their job. I hope you can help me out with this and don't even know where to start... Thank's in advance!
