How to get the selected item from Listbox and convert it to int?

[Jionni]

(Sorry, I've missed the code, here is the proper post:)

Hi,

how can I convert the selected item from Listbox and convert into integer for using in my code?

Here is the code:---------------------------------------------------------------------------------------------

from tkinter import*
root=Tk()

sizex = 600
sizey = 400
posx  = 40
posy  = 20

root.wm_geometry("%dx%d+%d+%d" % (sizex, sizey, posx, posy))

def Select(a):
    a = int(mylistbox.get(ANCHOR))
    if a == 1:
        a = 2 
        return(a)
    elif a == 2:
        a = 3
        return(a) 
   
            
mylistbox=Listbox(root,height=2, width=25, font=('times',13))
mylistbox.bind('<<ListboxSelect>>',Select)
#mylistbox.insert(1,2)
itemsforlistbox=['1','2']
mylistbox.place(x=32,y=90)

scroll = Scrollbar(root, orient=VERTICAL) # the allignment of the scrollbar
mylistbox["yscrollcommand"]=scroll.set # link the list with the scroll
scroll["command"]=mylistbox.yview # link the scroll with the scroll

mylistbox.grid(row=5, column=5)
scroll.grid(row=5, column=5, sticky=N+S+E)

for items in itemsforlistbox:
    mylistbox.insert(END,items)
    
root.mainloop()

-----------------------------------------------------------------------------------------------------------------------------------
I already converted the item into an integer and I can return it with a new value, but how can I use this value in my code? I've tried anything I can imagine, for example I used the variable b, but I always get an error:

---------------------------------------------------------------------------------------------------------------------------------------

from tkinter import*
root=Tk()

sizex = 600
sizey = 400
posx  = 40
posy  = 20

root.wm_geometry("%dx%d+%d+%d" % (sizex, sizey, posx, posy))

def Select(a):
    a = int(mylistbox.get(ANCHOR))
    if a == 1:
        a = 2 
        return(a)
    elif a == 2:
        a = 3
        return(a) 
    
b = Select(a) + 2 
            
mylistbox=Listbox(root,height=2, width=25, font=('times',13))
mylistbox.bind('<<ListboxSelect>>',Select)
#mylistbox.insert(1,2)
itemsforlistbox=['1','2']
mylistbox.place(x=32,y=90)

scroll = Scrollbar(root, orient=VERTICAL) # the allignment of the scrollbar
mylistbox["yscrollcommand"]=scroll.set # link the list with the scroll
scroll["command"]=mylistbox.yview # link the scroll with the scroll

mylistbox.grid(row=5, column=5)
scroll.grid(row=5, column=5, sticky=N+S+E)

for items in itemsforlistbox:
    mylistbox.insert(END,items)
    
root.mainloop()