hello, i am working on a game using pygame and i am going for an OOP approach, the files are pretty big, i will post only a portion of the code; also i am using pycharm so i know for a fact my identation, typing are alright.. plus i have been coding in python for a while now but i just can't grasp onto this issue :(, so far in the game i am just in the main menu phase and whenever i try to run my code i get an error that my game object (which has a reference to another class including the main menu game loop) has no attribute ''screenWidth'' but it actually does have a variable for my screen.. i just use it in the main menu to set another midWidth variable half of that variable as value
here is the code:

main.py

from game import Game

myGame = Game()

while myGame.running:
    myGame.currentMenu.drawMainMenu()
    myGame.gameLoop()

game.py

import pygame
from menu import MainMenu


class Game:
    def __init__(self):
        pygame.init()

        self.running, self.playing = True, False
        self.upKey, self.downKey, self.selectKey, self.backKey = False, False, False, False

        self.currentMenu = MainMenu(self)

        self.screenWidth = 1280
        self.screenHeight = 720
        self.gameWindow = pygame.display.set_mode((self.screenWidth, self.screenHeight))
        pygame.display.set_caption("Game Prototype")

        self.backgroundImage = pygame.image.load('Assets/Images/bg_greek.jpg')
        self.backgroundImage = pygame.transform.scale(self.backgroundImage, (1920, 1080))

    def gameLoop(self):
        while self.playing:
            self.checkEvents()

            if self.selectKey:
                self.playing = False

            self.gameWindow.blit(self.backgroundImage, (-600, -300))

            pygame.display.flip()
            self.resetKeys()

menu.py

import pygame


class Menu:
    def __init__(self, game):
        self.gameClass = game
        self.midWidth = self.gameClass.screenWidth / 2
        self.midHeight = self.gameClass.screenHeight / 2
        self.showMenu = True
        self.selectionX, self.selectionY = 0, 0

    def drawSelection(self):
        selectSurface = pygame.Surface((260, 100), pygame.SRCALPHA)
        selectSurface.fill((50, 50, 50, 175))
        selectRect = selectSurface.get_rect()
        selectRect.center = (self.selectionX, self.selectionY)
        self.gameClass.gameWindow.blit(selectSurface, selectRect)


class MainMenu(Menu):
    def __init__(self, game):
        Menu.__init__(self, game)
        self.hoveredState = "Start"
        self.startX, self.startY = self.midWidth, self.midHeight
        self.optionsX, self.optionsY = self.midWidth, self.midHeight + 100
        self.creditsX, self.creditsY = self.midWidth, self.midHeight + 200
        self.quitX, self.quitY = self.midWidth, self.midHeight + 300
        self.selectionX, self.selectionY = self.startX, self.startY

    def drawMainMenu(self):
        self.showMenu = True
        while self.showMenu:
            self.gameClass.checkEvents()
            self.checkInput()

            self.gameClass.gameWindow.blit(self.gameClass.backgroundImage, (-600, -300))
            self.drawSelection()
            self.gameClass.drawText("Play", 72, self.startX, self.startY)
            self.gameClass.drawText("Options", 72, self.optionsX, self.optionsY)
            self.gameClass.drawText("Credits", 72, self.creditsX, self.creditsY)
            self.gameClass.drawText("Quit", 72, self.quitX, self.quitY)

            pygame.display.flip()
            self.gameClass.resetKeys()

it is not complete though