[Tkinter] Tkinter - I have problem after import varaible or function from aGUI to script

[johnjh]

I have GUI Tkinter code as aGUI.py :

import os
from tkinter import *
from tkinter import ttk

root = Tk()
root.title("APP")
scripte = ttk.Button(root, text="Run")
scripte.grid(row=3, column=2, columnspan=2, padx=20, pady=20)

db = 6     #this varaible export to script called a.py

def runApp():
        print('app running')

scripte.config(command=runApp)

 root.mainloop()

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script code as a.py

from aGUI import db

number = db

print(number)

After Open App from aGUI.py and click in Run button to print db varaible from a.py , this button open app why?

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After Run a.py the app from aGUI.py opened why?

Any suggested.