Запоминание введенных координат

from tkinter import *
import time
import numpy as np
import pyscreenshot as ImageGrab
import cv2
import pytesseract
import pyautogui
filename = 'Image.png'
 
window = Tk()
window.title('штука')
window.geometry('250x125+900+100')
window.config(bg="gray")
window.resizable(width = False, height = False)
 
 
def cor_1():
    time.sleep(2)
    x1 = (pyautogui.position())
    g = (x1[-2])
    y1 = (pyautogui.position())
    y = (y1[-1])
 
 
 
def cor_2():
    time.sleep(2)
    z1 = (pyautogui.position())
    z = (z1[-2])
    c1 = (pyautogui.position())
    c = (c1[-1])
 
 
 
def chit_cof1():
        x = 1
        screen = np.array(ImageGrab.grab(bbox=(g, y, z, c)))
        cv2.imwrite(filename, screen)
        x = x + 1
        img = cv2.imread('Image.png')
        text = pytesseract.image_to_string(img)
        label1["text"] = text
 
 
label1 = Label(window, width=8, height=2)
label1.place(x=40, y=2)
 
 
btn1 = Button(window, bg='blue', fg='white', text='1', command=cor_1)
btn1.place(x=5, y=1)
 
btn2 = Button(window, bg='blue', fg='white', text='2', command=cor_2)
btn2.place(x=22, y=1)
 
 
btn5 = Button(window, bg='green', fg='white', text='ST', command=chit_cof1)
btn5.place(x=110, y=40)
 
window.mainloop()

def cor_1():
    global g, y
    time.sleep(2)
    x1 = (pyautogui.position())
    g = (x1[-2])
    y1 = (pyautogui.position())
    y = (y1[-1])
    return g, y
 
def cor_2():
    global z, c
    time.sleep(2)
    z1 = (pyautogui.position())
    z = (z1[-2])
    c1 = (pyautogui.position())
    c = (c1[-1])
    return z, c