Question

[Solved] Cannot use geometry manager pack inside

So I’m making an rss reader using the tkinter library, and in one of my methods I create a text widget. It displays fine until I try to add scrollbars to it.

Here is my code before the scrollbars:

   def create_text(self, root):
        self.textbox = Text(root, height = 10, width = 79, wrap = 'word')
        self.textbox.grid(column = 0, row = 0)

Here is my code after:

def create_text(self, root):
        self.textbox = Text(root, height = 10, width = 79, wrap = 'word')
        vertscroll = ttk.Scrollbar(root)
        vertscroll.config(command=self.textbox.yview)
        vertscroll.pack(side="right", fill="y", expand=False)
        self.textbox.config(yscrllcommand=vertscroll.set)
        self.textbox.pack(side="left", fill="both", expand=True)
        self.textbox.grid(column = 0, row = 0)

This gives me the error

_tkinter.TclError: cannot use geometry manager pack inside .
56155888 which already has slaves managed by grid on the line
vertscroll.pack(side=”right”, fill=”y”, expand=False)

Any ideas how to fix this?

Solution #1:

Per the docs, don’t mix pack and grid in the same master window:

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.

Thus, if you call grid on the textbox, do not call pack on the scrollbar.


import Tkinter as tk
import ttk

class App(object):
    def __init__(self, master, **kwargs):
        self.master = master
        self.create_text()

    def create_text(self):
        self.textbox = tk.Text(self.master, height = 10, width = 79, wrap = 'word')
        vertscroll = ttk.Scrollbar(self.master)
        vertscroll.config(command=self.textbox.yview)
        self.textbox.config(yscrollcommand=vertscroll.set)
        self.textbox.grid(column=0, row=0)
        vertscroll.grid(column=1, row=0, sticky='NS')

root = tk.Tk()
app = App(root)
root.mainloop()
Respondent: unutbu
Solution #2:

The reason of the code is simple, you CANNOT use pack and grid inside the same class or for the same frame. Thus, use only one.

Respondent: ThePerson
Solution #3:

You can’t use pack and grid inside the same class or the same frame.use only one

Respondent: Nduka Junior
The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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