Set a default value for a ttk Combobox

user_645498 0
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I'm using Python 3.2.1 in Arch Linux x86_64. This one is really driving me crazy: I just want to have a default, preselected value for a ttk.Combobox as soon as I grid it. This is my code:

from tkinter import Tk, StringVar, ttk

root = Tk()

def combo(parent):
    value = StringVar()
    box = ttk.Combobox(parent, textvariable=value, state='readonly')
    box['values'] = ('A', 'B', 'C')
    box.current(0)
    box.grid(column=0, row=0)

combo(root)

root.mainloop()

Which draws an empty Combobox. What's funny is that if I don't use a function it works perfectly:

from tkinter import Tk, StringVar, ttk

root = Tk()

value = StringVar()
box = ttk.Combobox(root, textvariable=value, state='readonly')
box['values'] = ('A', 'B', 'C')
box.current(0)
box.grid(column=0, row=0)

root.mainloop()

Of course, in the real program I have to use a function, so I need another solution.

ttk combobox python-3.x tkinter python
3 Answers

The get() method can be used within your function to rename the StringVar and save it under another name to avoid losing it altogether via garbage collection. 

value = StringVar()

keepvalue = value.get()

then use keepvalue instead of value:

box = ttk.Combobox(root, textvariable=keepvalue, state='readonly')

This had 'A' showing in the combobox for me.

user_20394150
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