Execute the program shown in the usual way. The result is shown in the following screenshot:

# dropdown_1.py
# >>>>>>>>>>>>>>>>>>>
from Tkinter import *
root = Tk()
root.title("Drop-down boxes for option selections.")
var = StringVar(root)
var.set("drop down menu button")
def grab_and_assign(event):
chosen_option = var.get()
label_chosen_variable= Label(root, text=chosen_option)
label_chosen_variable.grid(row=1, column=2)
print chosen_option
drop_menu = OptionMenu(root, var, "one", "two", "three", "four",  "meerkat", "12345", "6789", command=grab_and_assign)
drop_menu.grid(row=0, column=0)
label_left=Label(root, text="chosen variable= ")
label_left.grid(row=1, column=0)
root.mainloop()

The drop-down menu has its own button. The callback() function that gets called when this button is clicked is named grab_and_assign in this particular recipe and one of the instructions in this event service routine is to assign the value of the menu item selected to the variable chosen_option. The instruction that does this is chosen_option = var.get().

As we did previously, we reassure ourselves that everything works as expected by printing the new value of chosen_option as a label on the parent window.