.get() not able to get results of checkboxes - windows

Question

See the following snippet of code:
def choose_ID():
import ttk
global single_ID
id = BooleanVar()
toplevel = Toplevel()
label1 = Label(toplevel, text = "Choose a User ID.", width = 40).pack(anchor=W, pady=5)
for items in range(len(single_ID)):
id = Checkbutton(toplevel, text=single_ID[items], variable=single_ID[items])
id.pack(anchor=W, padx=5)
single_run_but = Button(toplevel, text = "Run", width=10, height=1, command=run_command).pack(anchor=S, pady=5)
id.get()
Its purpose is to open a popup window with a number of checkboxes (the number could be anything from 1 to 100) containing user id's that have been passed to the function from earlier in the script.
The problem is with the id.get() line at the end. When it runs it errors, saying "Checkbutton instance has no attribute 'get'"
What do I need to change to be able to note which of the checkboxes have been checked (it could be only one or multiple boxes)?
Many thanks,
Chris.

Answer 1

The last time you set id is in the for loop. During this, you set id to be a checkbutton, which does not have the get() method.
What you want to do is use the get() method on an IntVar that is associated with the checkbutton through the variable attribute. You can keep references to these variables in a list. I've made a small example of how to dynamically create checkbuttons and still be able to get their values.
from Tkinter import *
def run_command():
selected_ids = []
for i, id_var in enumerate(id_var_list):
if id_var.get():
selected_ids.append(id_list[i])
print selected_ids
root = Tk()
Label(root, text = "Choose a User ID.", width = 40).pack(anchor=W, pady=5)
id_list = ['ID1', 'ID2', 'ID100']
id_checkbutton_list = []
id_var_list = []
for item in id_list:
id_var = IntVar()
id_checkbutton = Checkbutton(root, text=item, variable=id_var)
id_checkbutton.pack(anchor=W, padx=5)
id_var_list.append(id_var)
id_checkbutton_list.append(id_checkbutton)
Button(root, text = "Run", width=10, height=1, command=run_command).pack(anchor=S, pady=5)
root.mainloop()