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Я пытаюсь создать простую игру в сапера, используя python и kivy, и я застрял, пытаясь создать экран «ВЫ ПРОИГРАЛИ». Я сделал метку с надписью «ВЫ ПРОИГРАЛИ» и поместил ее в Основной класс в файле kv с непрозрачностью 0, но когда я пытаюсь изменить непрозрачность метки на метку из класса ячеек, это выдает ошибку.

 import random from math import floor from time import time from kivy.app import App from kivy.uix.floatlayout import FloatLayout from kivy.uix.label import Label from kivy.uix.button import Button   class Cell(Button):   t1 = None  t2 = None  flag = True   def on_press(self):  self.t1 = time()   def on_release(self):  self.t2 = time()  interval = self.t2 - self.t1   if interval lt; 0.5:  self.opacity = 0  self.bomb_check()  print(Main().lose.opacity)  else:  self.flag_state()   def flag_state(self):   if self.flag == True:  self.text = "F"  else:  self.text = ""   self.flag = not self.flag   def bomb_check(self):  if Main.lst.count(self.id) gt; 0:  print(self.id)  Main.lose.opacity = 1    class Field(Label):  pass   class LoseScreen(Label):  pass   class Main(FloatLayout):   lst = []  cells = 9  total_cells = cells ** 2   def __init__(self, **kwargs):  super(Main, self).__init__(**kwargs)   self.lose.opacity = 0   # The for loop bellow is for initializing buttons to grid1  for i in range(0, self.total_cells):  b = Cell()  b.id = i  self.grid1.add_widget(b)   # The for loop bellow is for initializing labels to grid2  for i in range(0, self.total_cells):  f = Field()  f.id = i  self.grid2.add_widget(f)   self.add_mines()   def add_mines(self):   # The for loop bellow is for making "BOMB" in random children of the grid2  for i in range(0 , self.cells):  ind = floor(random.random()*self.total_cells)   # The wile loop bellow is for making sure that random number doesn't repeat  while len(self.lst) lt;= i:  if self.lst.count(ind) gt; 0:  ind = floor(random.random()*self.total_cells)  else:  self.lst.append(ind)  #print(ind)   for c in range (0, self.total_cells):  if(self.grid2.children[c].id == ind):  self.grid2.children[c].text = "BOMB"   # The for loop bellow is to make how many numbers of "BOMB" sorrounds a cell  for x in range(0, self.total_cells):  directions = [x 1, x-1, x self.cells, x-self.cells, x self.cells 1, x-self.cells 1, x self.cells-1, x-self.cells-1]  num = 0   # The if statement bellow is for the cell to not count outside the range of -gt;  # total cells and to not count from the last column to the first column or vise versa  if(self.grid2.children[x].text != "BOMB"):  for y in directions:  if y in range(0, self.total_cells):  if (self.grid2.children[y].text == "BOMB"):  if(x%self.cells == 0 and (y 1)%self.cells == 0):  continue  elif((x 1)%self.cells == 0 and y%self.cells == 0):  continue  else:  num  = 1    self.grid2.children[x].text = str(num)   class MineSweeperApp(App):  def build(self):  return Main()  MineSweeperApp().run()  

 lt;Maingt;:  grid1: grid1  grid2: grid2  lose: lose  GridLayout:  id: grid2  rows: root.cells  cols: root.cells  size_hint: 0.6, 0.6  pos: root.width/2 - self.width/2, root.height/2 - self.height/2  GridLayout:  id: grid1  rows: root.cells  cols: root.cells  spacing: 0, 0  size_hint: 0.6, 0.6  pos: root.width/2 - self.width/2, root.height/2 - self.height/2  LoseScreen:  id: lose  lt;Cellgt;:  lt;Fieldgt;:  background_color: 0.7, 0.7, 0.7, 1  color: 1, 0, 0, 1  padding: 100, 100  canvas.before:  Color:  rgba: self.background_color  Rectangle:  size: self.size  pos: self.pos  lt;LoseScreengt;:  text: "YOU LOSE"  font_size: 50  color: 1, 0, 0, 1  opacity: 0  

Это сообщение об ошибке:

 File "c:/Users/user/Desktop/Python Projects/kivy-minesweeper/main.py", line 45, in bomb_check  Main.lose.opacity = 1  AttributeError: 'kivy.properties.ObjectProperty' object has no attribute 'opacity'