python tkinter non blocking information - python-3.x

Question

I am trying to create non-blocking tkiner messagebox using multithreading. I know messagebox is not defined in this way, but I preferred the messagebox concept and functions. I am having actual main program which is quite large and complex so showing some example
program toto.py
import threading
from disp_message import disp_message
msg =" This is a test message"
msgtype = 1
t1 = threading.Thread(target=disp_message, args=(msg,msgtype,))
t1.start()
t1.join()
for i in range(100000):
print(i)
disp_message(msg,msgtype)
print("Done!")
disp_messagee python function code in another file
from tkinter import *
from tkinter import messagebox
def disp_message(msg,msgtype):
top = Tk()
top.withdraw()
if msgtype==1:
messagebox.showwarning("Warning",msg)
elif msgtype==2:
messagebox.showinfo("information",msg)
else:
messagebox.showerror("Error",msg)
When I run this program i am having 2 issues
1. Following error
Traceback (most recent call last):
File "toto.py", line 13, in <module>
disp_message(msg,msgtype)
File "c:\NSE\scripts\disp_message.py", line 8, in disp_message
messagebox.showwarning("Warning",msg)
File "C:\ProgramData\Anaconda\lib\tkinter\messagebox.py", line 87, in showwarning
return _show(title, message, WARNING, OK, **options)
File "C:\ProgramData\Anaconda\lib\tkinter\messagebox.py", line 72, in _show
res = Message(**options).show()
File "C:\ProgramData\Anaconda\lib\tkinter\commondialog.py", line 39, in show
w = Frame(self.master)
File "C:\ProgramData\Anaconda\lib\tkinter\__init__.py", line 2744, in __init__
Widget.__init__(self, master, 'frame', cnf, {}, extra)
File "C:\ProgramData\Anaconda\lib\tkinter\__init__.py", line 2299, in __init__
(widgetName, self._w) + extra + self._options(cnf))
RuntimeError: main thread is not in main loop
Secondly it displays messagebox and wait for acknowledgement.
While my objective is to display messagebox and parallel let program get executed and finished.
Can you pl help ?