How to change text of a label in the kivy language with python

Question

I was wondering how I could change the text of a label made inside the Kivy language using Python. Like how would I have user input from python be made as the text of a labe

Answer 1

Text of a label can be a kivy property, which can be later changed and since it is a kivy property it will automatically updated everywhere. Here is an example of your .py

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import StringProperty
import random

class YourWidget(Widget):
    random_number = StringProperty()

    def __init__(self, **kwargs):
        super(YourWidget, self).__init__(**kwargs)
        self.random_number = str(random.randint(1, 100))

    def change_text(self):
        self.random_number = str(random.randint(1, 100))

class YourApp(App):
    def build(self):
        return YourWidget()

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

and your .kv

<YourWidget>:
    BoxLayout:
        size: root.size
        Button:
            id: button1
            text: "Change text"
            on_release: root.change_text()
        Label:
            id: label1
            text: root.random_number

When you click the button, it will call change_text() function, which will randomly change the text of the label to random integer between 1 and 100.