import tkinter as tk
import threading
import time
import tkinter
 
#create/run_gui()
root=tk.Tk()
root.mainloop()
#give to another thread and delete the reference
def mayfly_func(obj):time.sleep(1)
mayfly=threading.Thread(target=mayfly_func,args=(root,))
mayfly.start()
del root
time.sleep(10**9)
#root will be garbage collected when the mayfly thread dies
#this occurs in the mayfly thread context and triggers a panic

###############################################################################

# #second error case, this time triggered with the _tkinter c library.
#
# import _tkinter
# import threading
# 
# class GUI():
#     def build_and_run_gui(self,
#             screenName=None, baseName='', className='Tk',useTk=1, sync=0, use=None):
#         wantobjects = 1
#         interactive = 0
#         self._tk=_tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
#         self._tk.mainloop()
#  
# #create/run_gui()
# g=GUI()
# gui_thread=threading.Thread(target=g.build_and_run_gui)
# gui_thread.start()