当我尝试访问屏幕 ID 时，“super”对象没有属性“__getattr__”

Question

这两天我一直在尝试解决这个问题。我几乎尝试了一切。我检查了我的 ID 10 次，无论它们是否是字符串。他们不是！！我放置了clock.schedule_one方法来延迟初始化，但程序没有在kv文件中定义id。这是代码；

这是错误消息；

KeyError: 'hasta'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "C:\Users\Melikşah GÜRCÜ\Desktop\md.py", line 162, in <module>

    DemoApp().run()

  File "C:\python\lib\site-packages\kivy\app.py", line 855, in run

    runTouchApp()

  File "C:\python\lib\site-packages\kivy\base.py", line 504, in runTouchApp

    EventLoop.window.mainloop()

  File "C:\python\lib\site-packages\kivy\core\window\window_sdl2.py", line 747, in mainloop

    self._mainloop()

  File "C:\python\lib\site-packages\kivy\core\window\window_sdl2.py", line 479, in _mainloop

    EventLoop.idle()

  File "C:\python\lib\site-packages\kivy\base.py", line 339, in idle

    Clock.tick()

  File "C:\python\lib\site-packages\kivy\clock.py", line 591, in tick

    self._process_events()

  File "kivy\_clock.pyx", line 384, in kivy._clock.CyClockBase._process_events

  File "kivy\_clock.pyx", line 414, in kivy._clock.CyClockBase._process_events

  File "kivy\_clock.pyx", line 412, in kivy._clock.CyClockBase._process_events

  File "kivy\_clock.pyx", line 167, in kivy._clock.ClockEvent.tick

  File "C:\Users\Melikşah GÜRCÜ\Desktop\md.py", line 155, in _press

    self.root.ids.hasta.text

  File "kivy\properties.pyx", line 863, in kivy.properties.ObservableDict.__getattr__

AttributeError: 'super' object has no attribute '__getattr__'

Answer 1

class DemoApp(MDApp):&nbsp; &nbsp; def _press(self, *dt):&nbsp; &nbsp; &nbsp; &nbsp; print(self.root.get_screen("scr2").ids.hasta.text)&nbsp; &nbsp; def _doThis(self, *dt):&nbsp; &nbsp; &nbsp; &nbsp; print(self.root.get_screen("scr2").ids.hasta.text)