Python Tkinter Combobox Example

from tkinter import *
from tkinter import ttk

root = Tk()
root.title('Example of Combobox in Python/tkinter')
#root.iconbitmap('c:/img.ico')
root.geometry("400x350")


def func():
    label = Label(root, text=cb.get()).pack()

options = ["Yellow", "Green", "Red"]

selected = StringVar()
selected.set("Green")

cb = ttk.Combobox(root, width=27, textvariable =selected)
cb['values'] = options
cb.pack()

button = Button(root, text="Show", command=func).pack()

root.mainloop()