Trying to embed tkinter checkboxes in a text box, within a toplevel - text

Question

I am working on a simple database that tracks bicycle inventory. Deep within my program I am hitting a snag that has stumped me all day. I am trying to create a list of checkboxes in a text box, (to make use of the scrollbar), all within a toplevel popup.
I can't upload my entire code, it's just too much, but here is the snippet dumbed down to get the thing working:
class Delete_bike:
def __init__(self, master):
self.master = master
top = self.top = tk.Toplevel(self.master)
text_frame = tk.Frame(self.top)
text_frame.grid(row = 0, padx = 10, pady = 10)
scb = tk.Scrollbar(text_frame)
scb.grid(row = 0, column = 1, sticky = 'ns')
d_tb = tk.Text(text_frame, height = 8, width = 40, yscrollcommand = scb.set)
d_tb.configure(font = ('Times', 10, 'bold'))
d_tb.grid(row = 0, column = 0)
scb.config(command = d_tb.yview)
test_d = {}
for i in range(10):
test_d[i] = 0
for i in test_d:
test_d[i] = tk.IntVar()
cb = tk.Checkbutton(text = i, variable = test_d[i])
d_tb.window_create(tk.END, window = cb)
d_tb.insert(tk.END, '\n')
The true version makes use of drawing from a shelved dictionary to populate the extensive list of bikes.
When I run this, I get the following exception, which I do not understand at all:
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python34\lib\tkinter\__init__.py", line 1538, in __call__
return self.func(*args)
File "C:\Users\Gregory\Desktop\Bike Roster v2.0.pyw", line 115, in delete_bike
x = Delete_bike(self.master)
File "C:\Users\Gregory\Desktop\Bike Roster v2.0.pyw", line 239, in __init__
d_tb.window_create(tk.END, window = cb)
File "C:\Python34\lib\tkinter\__init__.py", line 3296, in window_create
+ self._options(cnf, kw))
_tkinter.TclError: can't embed .52341336 in .52340888.52341000.52341112
So next, I copied the snippet to a stand alone program, copied next, which works perfectly fine. So can I not achieve my desired result in a toplevel? Granted I am new at all this and have no formal training or instruction on programming, but that seems to be the only difference I can see.
import tkinter as tk
from tkinter import ttk
import tkinter.scrolledtext as tkst
class Delete_bike:
def __init__(self, master):
self.master = master
# top = self.top = tk.Toplevel(self.master)
text_frame = tk.Frame(self.master)
text_frame.grid(row = 0, padx = 10, pady = 10)
scb = tk.Scrollbar(text_frame)
scb.grid(row = 0, column = 1, sticky = 'ns')
d_tb = tk.Text(text_frame, height = 8, width = 40, yscrollcommand = scb.set)
d_tb.configure(font = ('Times', 10, 'bold'))
d_tb.grid(row = 0, column = 0)
scb.config(command = d_tb.yview)
test_d = {}
for i in range(10):
test_d[i] = 0
for i in test_d:
test_d[i] = tk.IntVar()
cb = tk.Checkbutton(text = i, variable = test_d[i])
d_tb.window_create(tk.END, window = cb)
d_tb.insert(tk.END, '\n')
root = tk.Tk()
app = Delete_bike(root)
root.mainloop()
If I remove the hash-tag to activate the toplevel line of code and place the frame inside the toplevel, it generates the same error message. Left like this, it works.
And a second quick question, if I am doing something wrong here, and this can be achieved within a toplevel, can the scrolledtext module be used in lieu of the text box and scrollbar combination?
Thanks as always!

Answer 1

You aren't specifying the parent for the checkbutton, so it defaults to the root window. You can't have a widget with a parent in the root, but try to display it in a toplevel.
Make the checkbutton a child of the text widget.
cb = tk.Checkbutton(d_tb, ...)
Yes, you can use scrolledtext instead of a text and a scrollbar, but I don't see any advantage in doing so.