Getting the choice of optionmenu right after selection Python

Question

I was wondering if there is any way for me to see what the User has selected among the list displaying, let\'s say: [\"Apple\",\"Orange\",\"Grapes\"] right after th

Answer 1

Trace the StringVar.

from Tkinter import *

def option_changed(*args):
    print "the user chose the value {}".format(variable.get())
    print a

master = Tk()

a = "Foo"
variable = StringVar(master)
variable.set("Apple") # default value
variable.trace("w", option_changed)

w = OptionMenu(master, variable, "Apple", "Orange", "Grapes")
w.pack()

mainloop()

Here, option_changed will be called whenever the user chooses an option from the option menu.

---

You can wrap the trace argument in a lambda to specify your own parameters.

def option_changed(foo, bar, baz):
    #do stuff

#...
variable.trace("w", lambda *args: option_changed(qux, 23, "hello"))