[Tkinter] listbox selection

[DPaul]

Hi,
I have a listbox for MULTIPLE selection.

def getElement(event):
    selection = event.widget.curselection()

the variable "selection" becomes a vector as you select more lines. OK.
Like so:

Output:
(10, 11, 12, 15)

My question: "selection" gets sorted automatically, for every line you click.
The information of which line was selected first is lost. (Especially the first selection)
Yes, I can create a new variable to save this info, it would be nicer if I can prevent it from sorting.
thx,
Paul