Events passing in python with kivy -

i new python , kivy, trying clear widgets in host when button pressed, code follows:

from kivy.uix.button import button kivy.uix.gridlayout import gridlayout kivy.uix.boxlayout import boxlayout kivy.uix.popup import popup kivy.uix.label import label  spots={}  class spot(button):     '''     classdocs     '''     def __init__(self, **kwargs):         '''         constructor         '''         super(spot,self).__init__(**kwargs)         self.ismine=false         if 'text' in kwargs:             self.text=kwargs['text']         else:             self.text="x"      def on_press(self, *args, **kwargs):         #return button.on_press(self, *args, **kwargs)         game.spottouched(self, self.text)  class game(boxlayout):     def __init__(self,**kwargs):         super(game,self).__init__(**kwargs)         self.m=minesholder(rows=25, cols=25)         self.add_widget(self.m)         self.attachtogrid()      def attachtogrid(self):         self.m.clear_widgets()         spots.clear()         r in range(0,25):             c in range(0,25):                 idd=str(r)+","+str(c)                 spots[idd]=idd                 self.m.add_widget(spot(text=idd))      def spottouched(self,spotid):         #popup=popup(title=spotid)         #popup.open()         self.clear_widgets() 

the last line clearing widgets, , spot class has on_press event. trying pass event of on_press of button on app holding boxlayout (game class), please tell/point me in right direction lean on how pass events?

thank you.

i think want, based on comment on @inclement's answer: rid of on_press method on button. want bind event instead - work more wpf.

for r in range(0,25):     c in range(0,25):         idd=str(r)+","+str(c)         spots[idd]=idd         s = spot(text=idd)         self.m.add_widget(s)          s.bind(on_press=self.spottouched) 

so self.spottouched event handler spots on_press event.

s.bind(on_press=self.spottouched) 

is kind of this:

addhandler s.click, addressof spottouched 

note adding handler way, handler receive single argument spot instance. can spot.text instance.