Tkinter Tutorial - Comboxbox

main.py

from tkinter import *
from tkinter.ttk import Combobox,Button
from tkinter.messagebox import showinfo

root = Tk()
root.title("Window")
root.geometry("400x300+500+80")
root.resizable(0,0)
def get_color():
    showinfo(title="Information",message=f"Color: {st.get()}")
l = Label(root,text="Choose Color: ").pack(fill="x",padx=5,pady=5)

Colors = [
    "black",
    "white",
    "blue",
    "red",
    "green",
    "yellow"
]

st = StringVar()

com = Combobox(root,textvariable=st,values=Colors)
com["state"] = "readonly"
com.current(0)
com.pack(padx=5,pady=5)

btn = Button(root,text="Get",command=get_color).pack()
exit_btn = Button(root,text="Exit",command=root.quit).pack()

root.mainloop()