Python raises error when I use graphics.py commands inside a function when using multithreading

Question

I'm trying to create a little game where when you type in 'inventory' it opens a little window to display your items. However it doesn't work and give me an error every time. This is my code, and the error is below it. If anybody knows how to solve this that would make my day ;)

I am using graphics.py which is a little graphics library that simplifies the use of graphics for python beginners. I am required to use it as this is a school project, also I am running python 3.10.

I am using multithreading as the game takes choices from the player using if statements, and I don't want to copy the inventory code for each choice as that would end the branch.

    from threading import Thread
    from graphics import *
    import time
    choice = ""
    inv_open = False
    open = True
    win = GraphWin("game", 500, 500, )
    input_box = Entry(Point(250,250),30)
    input_box.draw(win).setFill("white")
    
    
    def get_choice():
        global choice
        while True:
            choice = input()
    
    def play_game():
        global choice
        while True:
            if choice == "hi":
                print("hello there")
                choice = ""
    
                while True:
                    if choice == "no":
                        print("why no?")
                        choice = ""
    
                    elif choice == "yes":
                        print("why yes?")
                        choice = ""
    
    def quit_game():
        global choice
        while True:
    
            if choice == "quit game":
                print("quitting game")
                choice = ""
    
    def help():
        global choice
        while open == True:
    
            if choice == "help":
                print("Figure it out stupid")
                choice = ""
    
    def set_inventory():
        global inv_open
        while open == True:
            if choice == "inventory":
                print("opening inventory")
                win_i = GraphWin("inventory", 200, 200)
                win_i.getMouse()
                win_i.close()
                choice = ""
    
    t2 = Thread(target = play_game)
    t3 = Thread(target = quit_game)
    t4 = Thread(target = help)
    t5 = Thread(target = set_inventory)
    
    if __name__ == "__main__":
    
        t2.start()
        t3.start()
        t4.start()
        t5.start()
    
    while open == True:
        win.getMouse()
        choice = input_box.getText()
        input_box.setText("")

Error I get:

Exception in thread Thread-4 (set_inventory):
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/threading.py", line 1009, in _bootstrap_inner
    self.run()
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/threading.py", line 946, in run
    self._target(*self._args, **self._kwargs)
  File "/Users/PycharmProjects/game/new/mprocessing.py", line 55, in set_inventory
    win_i = GraphWin("inventory", 200, 200)
  File "/Users/PycharmProjects/game/new/graphics.py", line 213, in __init__
    master = tk.Toplevel(_root)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/tkinter/__init__.py", line 2650, in __init__
    BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/tkinter/__init__.py", line 2601, in __init__
    self.tk.call(
RuntimeError: main thread is not in main loop