How to update MDLabel's Text on button click in kivy-CodePudding

I'm beginner in python(and also on kivy). I started to learning kivy(maybe kivymd) 4days ago. I learned basics of it. But I got some problems, Before learning kivy I learned tkinter. So I'm giving examples in tkinter which I wanna do with kivymd.

I tkinter:

from tkinter import *
import random

def change_word():
      site_list=['Google','Yahoo','Microsoft','APKpure','APKMB','Stackoverflow','Bing']
      text=random.choice(site_list)
      button_text.config(text=text)
      button_text.update()


root=Tk()
root.title('Help Me')
root.geometry('400x400')

button_text=Label(root,text='Click the Button Below to Change This Text',font='arial 15')
button_text.pack(pady=40)

button=Button(root,text='Change It',font='arial 15',command=change_word)
button.pack(pady=10)

root.mainloop()

I can update Label/Text with a def/Function using idname.config() to edit text and idname.update() to update it.

And in Kivymd:

from kivymd.app import MDApp
from kivy.lang import Builder
import random
from kivy.core.window import Window

Window.size=(400,600)

please_anwser_this="""
MDScreen:
      MDLabel:
            id:text-update
            text:'Click The Button below to Change this text'
            halign:'center'
            pos_hint:{'center_x':0.5,'center_y':0.6}
      MDFillRoundFlatIconButton:
            text:'Change It'
            pos_hint:{'center_x':0.5,'center_y':0.5}
            icon:'crop-rotate'
            on_press:
                  #What Command Should I type Here to Update 'text-update'/MDLabel's text?
"""

class AnsweredOrNot(MDApp):
      def build(self):
          builder=Builder.load_string(please_anwser_this)
          return builder
      
      def change_word(self): #What Parameters should I give after self?
            site_list=['Google','Yahoo','Microsoft','APKpure','APKMB','Stackoverflow','Bing']
            text=random.choice(site_list)


AnsweredOrNot().run()

I wanna update MDLabel.text/text-update.text with a function/def (Like tkinter/Any other way) while the button pressed. Can anyone Help me??

CodePudding user response：

You can reference text to the Label using ids

from kivymd.app import MDApp
from kivy.lang import Builder
import random
from kivy.core.window import Window

Window.size=(400,600)

please_anwser_this="""
MDScreen:
      MDLabel:
            id:text_update
            text:'Click The Button below to Change this text'
            halign:'center'
            pos_hint:{'center_x':0.5,'center_y':0.6}
      MDFillRoundFlatIconButton:
            text:'Change It'
            pos_hint:{'center_x':0.5,'center_y':0.5}
            icon:'crop-rotate'
            on_press:
                  app.change_word()
                  
"""

class AnsweredOrNot(MDApp):
      def build(self):
          builder=Builder.load_string(please_anwser_this)
          return builder
      
      def change_word(self): #What Parameters should I give after self?
            site_list=['Google','Yahoo','Microsoft','APKpure','APKMB','Stackoverflow','Bing']
            text=random.choice(site_list)
            self.root.ids.text_update.text=(text)
            


AnsweredOrNot().run()

I've changed Label id from text-update to text_update