from tkinter import Tk, Label, Button, Canvas, Entry, TOP, X, mainloop, LEFT, StringVar, OptionMenu

from functools import partial

master = Tk()

value = StringVar(master)

value.set('N/A')

m = OptionMenu(master, value, *[0, 1, 2])

m.pack()

def callback(result_var=None):

print(result_var.get())

callback_no_args = partial(callback, result_var=value)

b = Button(master, text="Get Dropdown value", command=callback_no_args)

b.pack()

# l = Label(master, textvariable = value)

# l.pack()

mainloop()

# Goal: Stateful application - 2 texts fields, button to add them