How to get tkinter OptionMenu to display the name of the selected option?

Question

In tkinter , I have created an option menu using the OptionMenu class. As an example, the OptionMenu below has options A , B , C , D , etc.:

self.clicked = tk.StringVar(self.parent)
self.clicked.set("Select Column")

self.drop = tk.OptionMenu(self.parent, self.clicked, 'Select Column', command=self.idle)
    for i in columnNames[:]:
        self.drop['menu'].add_command(label=i, command=tk._setit(self.clicked, i, self.select_data))
self.drop.pack()

Note: the function self.idle is just a lambda *args: None .

The function self.select_data is as follows:

def select_data(self):
    for col_name in df.columns:
        if col_name == self.clicked.get():
            self.option_display = col_name

The function self.select_data simply retrieves the option the user selects from the OptionMenu , but how would I update the OptionMenu to display the option selected in self.select_data ?

As an example, if the user selects option A , how would I update the OptionMenu to show A as selected?

Answer 1

The selectData() function should have the following signature:

def selectData(self, selected):
    print(selected)
    # or print(self.clicked.get())

Answer 2

This will print the dropdown selection to the console. but my suggestion is to avoid console in GUI based applications. create a text indicator and print output to it

from tkinter import *
tk = Tk()
def OptionMenu_SelectionEvent(event):
    print(var.get())
    pass
var = StringVar(); var.set("one")
options = ["one", "two", "three"]
OptionMenu(tk, var, *(options), command = OptionMenu_SelectionEvent).pack()
tk.mainloop()