import tkinter as tk

root=tk.Tk()
button=tk.Button(root,text="interrupt",command=root.quit)
var=tk.StringVar()
var.set("hello")
button.pack()
print(root.children)
print(var._name)
while root.children:
    root.mainloop()
    print("mainloop exited, resuming")
    print(var.get())
print(var.get())