Getting tkinter widget values outside main application class? - python-3.x

Question

I have a pygame project which has a main menu - in said menu I have it so that upon clicking the Options button it triggers a Tkinter UI to open. The UI has a OptionMenu widget affecting game speed. How do I retrieve the value of the OptionMenu outside the class I used to create the Tkinter window
Here is a simplified issue:
class GUI(object):
def __init__(self):
import Tk # etc...
# CODE FOR THE PROGRAM WINDOW
defaultSpeed = StringVar(root)
speedMenu = OptionMenu(root, defaultSpeed, 'Slow', 'Normal, 'Fast')
speedMenu.pack()
I know I need defaultSpeed.get() to get the value.
The Pygame menu has this:
click = pygame.mouse.get_pressed()
clicked = click[0] == 1
if "Play" clicked:
startGame(ticks)
if "Options" clicked:
options = GUI()
At this point ^^^ How do I somehow obtain the speed (defaultSpeed.get()) and have it as global variable so that I can use it in the startGame function to affect the number of ticks on clock?
Thinking about it, I'm essentially asking for how to have a global variable defined when initialising a Tkinter class?
I've tried creating a function in GUI() called getSpeed and calling options.getSpeed() but for some reason I still have a logic error that means it's never actually printed/displayed/returned.
I am aware you shouldn't return values when in __init__ - should I just move all my Tkinter app. to a function inside GUI() and leave the __init_ out? surely I could just refrain from initalising it? Would this be better off programmed procedurally over OOP (allowing me to simply call GUI() in the main menu)?
Any help solving is appreciated.
RECAP OF PROBLEM:
Main Menu has 2 options (1 runs game in Pygame, 1 runs Options window in Tkinter)
I need to get the option from the options menu and have it apply to a variable in the game.
EDIT: I was asked to provide a minimal code
I'm currently really busy but here is minimal pseudocode - all you need to do is create the dimensions for the game window and for the menu (they are both 940,500)
import pygame
import time
import math
import tkinter
from tkinter import *
pygame.init()
clock = pygame.tick.Clock()
ticks = 0
#Here is all the game code
#This function is the main game and includes the game loop
def StartGame(ticks):
running = True
myGame1 = teams()
myGame1.startTeam()
#Here is some functions providing the rules of the sport
def updateBall(ticks):
theBall.x += float(theBall.speed) * ticks / 1000
while running:
myGame1.displayPlayers()
updateBall(ticks)
#Calling alot of functions and the game running is here
ticks = clock.tick(30)
pygame.display.flip
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
pygame.quit()
quit
def game_intro(menu_image):
intro = True
while intro:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
pygame.quit()
quit
click = pygame.mouse.get_pressed()
clicked = click[0] == 1
if 62+288 > mouse[0] > 62 and 150+28 > mouse[1] > 150:
if clicked:
startGame(ticks)
pass
elif 62+288 > mouse[0] > 62 and 230+30 > mouse[1] > 230:
if clicked:
options = GUI()
class GUI(object):
def __init__(self):
root = self.root = tkinter.Tk
root.geometry('500x400')
root.configure(background = '#ffffff')
speedLabel = tkinter.Message(root, text = 'Game speed: ')
defaultSpeed = StringVar(root)
speedMenu = OptionMenu(root,defaultSpeed, 'Slow', 'Normal', 'Fast')
speedLabel.grid(row = 0, column = 0)
speedMenu.grid(row = 0, column = 1)
game_intro(menu_image)

Answer 1

Before you create defaultSpeed:
global defaultSpeed
Then before you access it:
global defaultSpeed
It basically means that you can access the variable from anywhere after using global.