KIVY: Numeric Keyboard ON Text of the Text Field

Question

I am trying to add Numeric Keyboard in UI

Which will be display as clicked on the text on filed

But some how Numeric keyboard not show in the UI

I use numeric.json file to open the numeric keyboard as per the kivy Documentation json file and link is [https://github.com/kivy/kivy/blob/master/examples/keyboard/numeric.json]

here is my code below

enter code here


   from kivy.lang import Builder
   from kivymd.app import MDApp
   from kivymd.uix.screen import MDScreen
   from kivy.uix.relativelayout import RelativeLayout
   from kivy.uix.screenmanager import ScreenManager

   from kivy.core.window import Window




   KV= '''
   <REGITRATION_Window>:
        name:'regitration_window1'
        RelativeLayout:

             MDToolbar:
                title: 'Registraion'
                elevation: 10
                left_action_items: [['arrow-left']]
                pos_hint: {"left":1, "top":1}
       
             MDLabel:
                text: 'Country Code '
                font_size: 15
                pos_hint : {'x':0.0322, 'y':0.272}
    
             MDTextFieldRound:
                int_text: 'For Eg:- +91'
                pos_hint : {'x':0.0322, 'y':0.710}
                size_hint : 0.08, .045
                on_text: app.setup_key()

             MDLabel:
                text: 'Mobile Number'
                font_size: 15
                pos_hint : {'x':0.305, 'y':0.272}
    
             MDTextFieldRound:
                hint_text: 'For Eg:- 987654321'
                pos_hint :{'x':0.305, 'y':0.710}
                size_hint : 0.35, .045
            
             MDFillRoundFlatButton:
                text:'REGISTER'
                pos_hint: {'x':.1, 'y':.1}
             MDFillRoundFlatButton:
                 text:'Cancel'
                 pos_hint: {'x':.3, 'y':.1}

             RelativeLayout:
                 id: data_layout


  WindowManager:

     REGITRATION_Window:
         id: key_num


        '''


     class REGITRATION_Window(MDScreen):
          pass


    class WindowManager(ScreenManager):
          pass

    class MainApp(MDApp):
         def build(self):
             return Builder.load_string(KV)

         def close_key(self):
             pass
         def setup_key(self):
             NumKB = Window.request_keyboard(self.close_key, self)
             if NumKB.widget:
                 NumKB.widget.layout = 'numeric.json'
                 self.root.ids.key_num.ids.data_layout.add_widget(self.NumKB)
        

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