Tkinter Scrollbar in textWidget, howto - python-3.x

Question

I am working on a small texteditor in python. With app being my master i am trying to implement a textWidget, in which i want to place a functional scrollbar.
The problem i am facing is following:
In order to have a textWidget to place my scrollbar in, i have to implement my textWidget first. But already as an argument in Tk.Text i need to place the yscrollcommand for my scrollbar. Which means that my textWidget will not know what my scrollbar is.
If i turn it around i am not able to create my scrollbar within the textWidget, because it is not yet created.
First example where my textWidget is created first
# MENU BAR EXAMPLE
menu_bar = Tk.Menu()
# Set menu bar as menu for the app
app.config(menu=menu_bar)
# Fill menubar with "File" menu
filemenu = Tk.Menu(app,menu_bar, tearoff=0)
#filemenu.add_command(label="Exit", command=exit)
menu_bar.add_cascade(label="File", menu=filemenu)
menu_bar.add_cascade(label="File2", menu=filemenu)
filemenu.add_command(label="Exit", command=exit)
# BUTTON EXAMPLE
button = Tk.Button(app, text="Exit", command=quit)
button.pack(side=Tk.BOTTOM, fill=Tk.X)
# TEXT WIDGET
textWidget = Tk.Text(textWidget, yscrollcommand=scrollbar.set)
textWidget.pack(expand=True,fill=Tk.BOTH)
# SCROLLBAR
scrollbar=Tk.Scrollbar(textWidget)
scrollbar.pack(side=Tk.RIGHT, fill= Tk.Y)
scrollbar.config(command=textWidget.yview)
#Start the main event loop (i.e. run the tkinter program)
app.mainloop()
######################################################
Second example where scrollbar is created first
# MENU BAR EXAMPLE
menu_bar = Tk.Menu()
# Set menu bar as menu for the app
app.config(menu=menu_bar)
# Fill menubar with "File" menu
filemenu = Tk.Menu(app,menu_bar, tearoff=0)
#filemenu.add_command(label="Exit", command=exit)
menu_bar.add_cascade(label="File", menu=filemenu)
menu_bar.add_cascade(label="File2", menu=filemenu)
filemenu.add_command(label="Exit", command=exit)
# BUTTON EXAMPLE
button = Tk.Button(app, text="Exit", command=quit)
button.pack(side=Tk.BOTTOM, fill=Tk.X)
# SCROLLBAR
scrollbar=Tk.Scrollbar(textWidget)
scrollbar.pack(side=Tk.RIGHT, fill= Tk.Y)
scrollbar.config(command=textWidget.yview)
# TEXT WIDGET
textWidget = Tk.Text(textWidget, yscrollcommand=scrollbar.set)
textWidget.pack(expand=True,fill=Tk.BOTH)
And this is how i had to do to make it work. But it feelsBadMan if i have to create a textWidget, create a scrollbar and then create a textWidget again.
# MENU BAR EXAMPLE
menu_bar = Tk.Menu()
# Set menu bar as menu for the app
app.config(menu=menu_bar)
# Fill menubar with "File" menu
filemenu = Tk.Menu(app,menu_bar, tearoff=0)
#filemenu.add_command(label="Exit", command=exit)
menu_bar.add_cascade(label="File", menu=filemenu)
menu_bar.add_cascade(label="File2", menu=filemenu)
filemenu.add_command(label="Exit", command=exit)
# BUTTON EXAMPLE
button = Tk.Button(app, text="Exit", command=quit)
button.pack(side=Tk.BOTTOM, fill=Tk.X)
# TEXT WIDGET
textWidget = Tk.Text(app)
textWidget.pack(expand=True,fill=Tk.BOTH)
# SCROLLBAR
scrollbar=Tk.Scrollbar(textWidget)
scrollbar.pack(side=Tk.RIGHT, fill= Tk.Y)
textWidget = Tk.Text(textWidget, yscrollcommand=scrollbar.set) # <--- Creating textWidget again
#textWidget.pack(side=Tk.LEFT, fill=Tk.BOTH)
scrollbar.config(command=textWidget.yview)
textWidget.pack(expand=True,fill=Tk.BOTH)
# Start the main event loop (i.e. run the tkinter program)
app.mainloop()
Any ideas? =)

Answer 1

It takes three steps:
create the text widget
create the scrollbar, and link it to the text widget
link the text widget to the scrollbar
You can reverse the order if you want: create the scrollbar, then the text, then configure the scrollbar. Also, the scrollbar should not be placed inside the text widget. The text widget and the scrollbar typically share the same parent.
Example:
textWidget = Tk.Text(app)
scrollbar = Tk.Scrollbar(app, command=textWidget.yview)
textWidget.configure(yscrollcommand=scrollbar.set)