How To Set Existing Text From A Variable Within A Function? Python Kivy

I created a function that opens a log file, and saves it to a variable named loginfo. In my kivy file, I have a TextInput widget. I tried setting the existing text: to root.loginfo

Solution 1:

Here is a complete example to do what you want to do. You'll have to modify it to integrate it with your code, but my intention here was to show you the proper way to achieve this and let your work with it yourself.

Note how I'm using Clock.schedule_interval instead of schedule once. The 1 in the schedule_interval is the time between calling the self.reset_text function in seconds. Note how in the reset_text function I can refer to my base widget in my kv file using self.root (the GridLayout), then I can get the TextInput (since I gave it an id) by doing self.root.ids['my_text_input']

main.py

from kivy.app import App
from kivy.clock import Clock
from kivy.lang import Builder

GUI = Builder.load_file("main.kv")

classMainApp(App):
    defbuild(self):
        Clock.schedule_interval(self.reset_text, 1) # Check if log has changed once a secondreturn GUI

    defreset_text(self, *args):
        withopen("logtest.log", "r") as f:
            self.root.ids['my_text_input'].text = f.read()

MainApp().run()

main.kv

GridLayout:# This is the 'root' widget when referenced in python filecols:1TextInput:id:my_text_input