CODEWITHSUNDEEP
pythonkivy
Eli B
Eli B

Reputation: 51

kv. is loaded multiple times. How to I prevent kv. from looping itself?

I am able to run the program but when it loads the kivy window is blank. I keep receiving a warning that the kivy is loaded multiple times. Thank you in advance.

[WARNING] [Lang ] The file C:\Users\Eli\PycharmProjects\MedBay\mymain.kv is loaded multiples times, you might have unwanted behaviors.

main.py

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen

class WindowManager(ScreenManager):
    pass
class MainWindow(Screen):
     pass

class SecondWindow(Screen):
    pass

kv = Builder.load_file("mymain.kv")
class MyMainApp(App):
    def build(self):
        return kv

if __name__ =="__main__":
    MyMainApp().run()

kv file (named mymain.kv)

WindowManager:
    MainWindow:
    SecondWindow:
<MainManager>:
    name: "Main"
    GridLayout:
        cols: 1
        GridLayout:
            cols: 2
            Label:
                text: "password:"
            TextInput:
                id: passw
                multiline: False
        Button:
            text: "Submit"
            on_release:
                app.root.current = "second"

<SecondWindow>:
    name:"second"
    Button:
        text: "Go Back"
        on_release:
            app.root.current = "Main"

Upvotes: 0

Views: 417

Answers (1)

inclement
inclement

Reputation: 29468

kv = Builder.load_file("mymain.kv")
class MyMainApp(App):

The App, when run, automatically loads a kv file with the same name as the app (omitting any trailing App and converting to lowercase). Thus, your kv file is loaded twice.

See the documentation for more information.

Upvotes: 1

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