Ive already came across with some other questions similar to this one and none could help at all. I just installed Kivy through pip install (only use a single venv) and I made two simple example-boxes via python and they did worked in VScode. Then an issue starts as I try to use kv language. It turns out that nothing happens, that is, my app runs and a black window is the only thing.

import kivy
from kivy.app  import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label


class Action(BoxLayout):
    def sum(self):
        self.ids.lb.text =str(int(self.ids['lb'].text) 1)

class box(App):

        def build(self):          
            return Action()

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

The kivy seems to be properly installed because I had already ran a python code (boxLayout) once before. The main difficulty is to get Vscode to recognize the kv file, and I couldnt find it nowhere else yet. Thank u all in advance, and also I attach here the kv. code that interacts with the py one.

CodePudding user response：

You need to ensure that you are following the correct conventions.

The following

Clicking the button increases the value in the label.