使用KIVY共同卡在加载窗口中

如何解决使用KIVY共同卡在加载窗口中

我继续使用Python和Kivy进行POS教程，并陷入了似乎消失并不断出现的错误。我有一个main.py文件，试图在其中加载引发属性错误的窗口admin.py

  File "C:/Users/John/PycharmProjects/FirstKivyApplication/main.py",line 3,in <module>
     from Admin.admin import AdminWindow
   File "C:\Users\John\PycharmProjects\FirstKivyApplication\Admin\admin.py",line 22,in <module>
     Builder.load_file('Admin/admin.kv')
   File "C:\Users\John\PycharmProjects\FirstKivyApplication\lib\site-packages\kivy\lang\builder.py",line 301,in load_file
     return self.load_string(data,**kwargs)
   File "C:\Users\John\PycharmProjects\FirstKivyApplication\lib\site-packages\kivy\lang\builder.py",line 399,in load_string
     widget = Factory.get(parser.root.name)(__no_builder=True)
   File "C:\Users\John\PycharmProjects\FirstKivyApplication\lib\site-packages\kivy\factory.py",line 130,in __getattr__
     raise AttributeError
 AttributeError

MAIN.PY

from kivy.app import App
from kivy.uix.Boxlayout import BoxLayout
from Admin.admin import AdminWindow
from Signin.signin import SignInWindow
from Operator.theoperator import OperatorWindow

class MainWindow(BoxLayout):

   admin_widget = AdminWindow() #An instance of our Admin wdindow
   signin_widget = SignInWindow() # An instance of our sign in window
   operator_widget = OperatorWindow() # An instance of our Operator window

def __init__(self,**kwargs):
    super().__init__(**kwargs)

    self.ids.scrn_si.add_widget(self.signin_widget)
    self.ids.scrn_admin.add_widget(self.admin_widget)
    self.ids.scrn_op.add_widget(self.operator_widget)


class MainApp(App):
    def build(self):
        return MainWindow()


if __name__ == "__main__":
    sa = MainApp()
    sa.run()

ADMIN.PY

from kivy.uix.modalview import ModalView
from kivy.lang import Builder

Builder.load_file('Admin/admin.kv')

class Notify(ModalView):
    def __init__(self,**kwargs):
        super().__init__(**kwargs)

        self.size_hint = (.3,.3)


class AdminWindow(BoxLayout):
    def __init__(self,**kwargs):
        super().__init__(**kwargs)


    def logout(self):
        self.parent.parent.current = 'scrn_si'

class AdminApp(App):
    def build(self):
        return AdminWindow()


if __name__ == '__main__':
    AdminApp().run()

这是我的项目结构：

解决方法

我在下面的相对kv文件中忘记了此声明。

#: import Window kivy.core.window.Window