AttributeError: 'super' 对象在 kivymd 请求应用程序中没有属性 '__getattr__' 错误

Question

it was running while my load file was .kv file but I cant switch screen on condition so I tried string load file but now It show this error.

File "C:\\Users\\armof\\PycharmProjects\\screen\\main.py", line 142, in logger payload={'Uname': self.root.ids.user.text, 'psw': self.root.ids.password.text} File "kivy\\properties.pyx", line 864, in kivy.properties.ObservableDict. getattr AttributeError: 'super' object has no attribute ' getattr '

Thanks for your efforts :)

from kivymd.app import MDApp
from kivy.lang.builder import Builder
from kivy.uix.screenmanager import Screen,ScreenManager
import requests

screen_helper = """
ScreenManager:
    MenuScreen:
    ProfileScreen:
    
<MenuScreen>:
    name : "login"
    Image:
        source:"C:/arka.png"


    MDCard:
        size_hint:None,None
        size: 400,600
        pos_hint : {"center_x":0.5,"center_y":0.5}
        elevation:10
        padding:25
        spacing:25
        orientation : 'vertical'
        Image:
            source:"C:/burbantgrilogo.png"
            pos:300,380





        MDLabel:

            text:""
            id:welcome_label
            font_size:30
            halign : 'center'
            size_hint_y:None
            height:self.texture_size[1]
            padding_y:15




        MDTextFieldRound:
            id: user
            hint_text:"username"
            icon_right:"account"
            size_hint_x:None
            width: 200
            font_size:18
            pos_hint:{"center_x":0.5}

        MDTextFieldRound:
            id: password
            hint_text:"password"
            icon_right:"eye-off"
            size_hint_x:None
            width: 200
            font_size:18
            pos_hint:{"center_x":0.5}
            password:True

        MDRoundFlatButton:
            text:"LOG IN"
            font_size: 12
            pos_hint:{"center_x":0.5}
            on_press:app.logger()





        MDRoundFlatButton:
            text:"CLEAR"
            font_size: 12
            pos_hint:{"center_x":0.5}
            on_press:app.clear()

        Widget:
            size_hint_y: None
            height: 70
                
<ProfileScreen>:
    name:"Teklif"
    Image:
        source:"C:/arka.png"

    MDCard:
        size_hint:None,None
        size: 400,600
        pos_hint : {"center_x":0.5,"center_y":0.5}
        elevation:10
        padding:25
        spacing:25
        orientation : 'vertical'

        Image:
            source:"C:/burbantgrilogo.png"
            pos:300,380




        MDRoundFlatButton:
            text:"OPEN"
            font_size: 12
            pos_hint:{"center_x":0.5}

            on_release: root.current = "login"

        MDRoundFlatButton:
            text:"NEW"
            font_size: 12
            pos_hint:{"center_x":0.5}
        Widget:
            size_hint_y: None
            height: 130
            
"""
class MenuScreen(Screen):
    pass

class ProfileScreen(Screen):
    pass

sm = ScreenManager()
sm.add_widget(MenuScreen(name='login'))
sm.add_widget(ProfileScreen(name='Teklif'))

class MainApp(MDApp):
    def build(self):
        self.theme_cls.theme_style = "Light"
        self.theme_cls.primary_palette = "Red"
        screen = Builder.load_string(screen_helper)
        return screen

    def logger(self, *args):


        payload={'Uname': self.root.ids.user.text, 'psw': self.root.ids.password.text}
        print(payload)
        r = requests.get(f"http://burbant.com/otomasyon?Uname={self.root.ids.user.text}&psw={self.root.ids.password.text}")
        print(r.text)

        if r.text == 'True':

            self.root.ids.welcome_label.text = f'Hoşgeldin {self.root.ids.user.text}!'
            sm.switch_to(screen='Teklif')




        else:
            self.root.ids.welcome_label.text = f'Hatalı'
    def clear(self):
        self.root.ids.welcome_label.text = ""
        self.root.ids.user.text = ""
        self.root.ids.password.text = ""


MainApp().run()

Answer 1

The problem is that self.root.ids is an empty dictionary, so trying to access any key in that empty dictionary will cause that error. The ids that you are trying to access are in the MenuScreen instance, which you can access using the get_screen() method of ScreenManager , like this:

def logger(self, *args):
    menuscreen = self.root.get_screen('login')
    payload = {'Uname': menuscreen.ids.user.text, 'psw': menuscreen.ids.password.text}
    print(payload)
    .
    .
    .

You have the same error elsewhere in your code. Wherever you have self.root.ids , you will need to apply similar logic.