scrollbar can not work well in different tabs of Tkinter notebook with python 2.7.10 on macos

I create a notebook frame with two tabs, and each tab has a Text component and a Scrollbar component. but in this case the scrollbar can not work well.

the exceptions like this:

1. launch this script
2. select the 'tab 1', then i can drag it's scrollbar
3. select the 'tab 2', then i can drag it's scrollbar

4. then, select 'tab 1' again, but I can not drag the scrollbar in 'tab 1' at this time.

os:MacOS

version:the default python V2.7.10 on mac system

is there any body know how to solve this problem? and why?

# coding=utf-8  from Tkinter import (Tk, Text, Scrollbar)  from Tkconstants import (END, RIGHT, X, Y, BOTH, YES)  import ttk    def add_tab_with_text(master,title):      '''add a tab to ttk.Notebook, and add a Text with scrollbar to each tab'''      mytab = ttk.Frame(master)      master.add(mytab, text=title)        # set Scrollbar      scrollbar_v = Scrollbar(mytab)      scrollbar_v.pack(side=RIGHT, fill=Y)        # set Text      mytext = Text(mytab, width=40, height=40)      mytext.config(yscrollcommand=scrollbar_v.set)      mytext.pack(expand=YES,fill=BOTH)        # Text insert message      for i in range(1, 1000):          mytext.insert(END, '%s line: %d.0\n' % (title,i))        # Scrollbar add bind      scrollbar_v.config(command=mytext.yview)    main_win = Tk()  main_win.title('Scrollbar test')  main_win.geometry('800x800')    nb = ttk.Notebook(main_win)  add_tab_with_text(nb,'tab 1') # create Tab 1  add_tab_with_text(nb,'tab 2') # create Tab 2    nb.pack(fill='both',side='top')  main_win.mainloop()  

https://stackoverflow.com/questions/67443439/scrollbar-can-not-work-well-in-different-tabs-of-tkinter-notebook-with-python-2 May 08, 2021 at 10:04AM