python - Tkinter Splits Menu and Main Window Upon Attempted Close -

i using tkinter build basic text editor. have small file menu 4 buttons: open, save, new file, , exit. main part of window devoted editor , buttons pop (saving, opening, etc.) however, have couple of problems: 1) when attempt close main window exit button on window border, splits main window in 1 window , menu in smaller window. remains functional, have close 2 windows terminate program. when use exit button in menu not happen. 2) second problem unrelated question title, code here so: have 4 items coded menu section, 3 showing up. fourth appears when above phenomenon occurs. why doing that? , how can fix it?

thanks much! description of phenomena insufficient, here link picture of describing: https://goo.gl/vjwi5x can see in top right hand corner window black (this main text editor) no menu--right next menu, in smaller window, along buttons happen open @ time.

here code:

from tkinter import * import sys import menu_config import tkmessagebox import error_mes  #variables globally needed file_input = "" #whats put text box _file_= "" #file user wants open; readapt synonymous save? open_a_file = "" #will entry field opening file target = "" new_file_ = "" new_file_name = "" def get_from_text():     global file_input     try:         file_input = my_text_box.get("1.0", end)         print file_input     except:         file_input = 'uhoh'         print file_input  def save():     global file_input, file_, target, _file_     file_input = my_text_box.get("1.0", end)     target = open(_file_, "r+w")     target.truncate()     target.write(file_input)  def exit_application():     sys.exit(0)  def menu_open_file():     global _file_, open_a_file, save     try:         open_a_file = entry()         open_a_file.grid(row = 3, column = 0)         open_a_file.insert(0, "path file open")         save.grid_forget()         button(main, text = "click open", command = get_file).grid(row = 4,                                                                      column = 0)     except:         #tkmessagebox.showinfo("error code 52", "something went wrong.")         error_mes.error()  def get_file():     global _file_, open_a_file     _file_ = open_a_file.get()     target = open(_file_, "r+w")     opened_file = target.read()     try:         my_text_box.insert(insert, opened_file)     except:         tkmessagebox.showinfo("this wrong", "something went wrong!")  def new_file():     global new_file_     my_text_box.delete(1.0, end)     try:         new_file_ = entry()         new_file_.grid(row = 3, column = 0)         new_file_.insert(0, "path new file + name")         button(main, text = "click save", command = save_new_file).grid(row = 4,                                                                      column = 0)     except:         tkmessagebox.showinfo("error code 52", "something went wrong.")  def save_new_file():     global new_file_, new_file_name     new_file_name = new_file_.get()    my_text_box = text(bg = "black", fg = "white", insertbackground = "white") my_text_box.grid(row = 0, column = 0)    def main():     main = tk()     #the menu      first_menu = menu(main)     main.config(menu = first_menu)     filemenu = menu(first_menu)     filemenu.add_command(label = "open", command = menu_open_file)     filemenu.add_command(label = "new file...", command = new_file)     filemenu.add_command(label = "save", command = save)     filemenu.add_command(label = "exit", command = exit_application)     first_menu.add_cascade(label = "file", menu = filemenu)      savebutton = button(main, text = "save", command = save)     savebutton.grid(row = 3, column = 0)     main.mainloop()  if __name__ == '__main__':     main() 

the module error_mes 1 created...sorry confusion. has no effect on program. code if helps:

import tkmessagebox  def error():     tkmessagebox.showinfo("error 52", "something went wrong.") 

the problem lies in these 2 lines of code:

my_text_box = text(bg = "black", fg = "white", insertbackground = "white") my_text_box.grid(row = 0, column = 0) 

these lines of code run before create root window. because of that, creates implicit root window. later, execute code:

main = tk() 

the above creates second root window in else resides.

the solution move creation of my_text_box after create root window, , sure , give root window parent.