TkInter grid function error message

Question

I am trying to run the following code:

from tkinter import *
root = Tk()
topFrame = Frame(root)
topFrame.pack(side=TOP)
leftFrame = Frame(root)
leftFrame.pack(side=LEFT)
botFrame = Frame(root)
botFrame.pack(side=BOTTOM)
button1 = Button(leftFrame, text="Button 1", fg="Black")
button2 = Button(leftFrame, text="Button 2", fg="Black")
button3 = Button(leftFrame, text="Button 3", fg="Black")
button1.grid(row=0, column=0)
button2.grid(row=1, column=0)
button3.grid(row=2, column=0)
ScaleWidget = Scale(root, from_=0, to=100)
ScaleWidget.grid(row=0, column=1)
ScaleWidget = Scale(root, from_=0, to=100, orient=HORIZONTAL)
ScaleWidget.grid(row=0, column=1)
root.mainloop()

However I am getting to following error message:

D:\Python\python.exe D:/untitled/TkInter_Frame_Full_GUI.py
Traceback (most recent call last):
 File "D:/untitled/TkInter_Frame_Full_GUI.py", line 21, in <module>
 ScaleWidget.grid(row=0, column=1)
 File "D:\Python\lib\tkinter\__init__.py", line 2057, in grid_configure
 + self._options(cnf, kw))
_tkinter.TclError: cannot use geometry manager grid inside . which already has slaves managed by pack

and am unsure of what to do, help is much appreciated, thanks!

• Bhargav Rao: It is advised not to mix pack and grid
• Kevin: Try putting your Scale widgets inside one of your frames instead of putting them directly in the root.
• Bryan Oakley: @BhargavRao: be careful with that advice. A better way to say it is you absolutely cannot mix grid and pack in the same container, but you can (and it's encouraged) to use both grid and pack within an application as a whole.
• Bhargav Rao: @BryanOakley I'm sorry, I actually meant to say that... :(
• Stevoisiak: Possible duplicate of Cannot use geometry manager pack inside

Answer 1

You shouldn't mix grid and pack managers for windows that share a common parent:

Warning: Never mix grid and pack in the same master window. Tkinter will happily spend the rest of your lifetime trying to negotiate a solution that both managers are happy with. Instead of waiting, kill the application, and take another look at your code. A common mistake is to use the wrong parent for some of the widgets.

Source : http://effbot.org/tkinterbook/grid.htm