from tkinter import * from tkinter import ttk def func(): l2.configure(text=cb.get()) win =Tk() win.title("Aimtocode Python") win.geometry('200x100') course=["Java","Python","C","C++","JavaScript","PHP","HTML","CSS"] l1=Label(win,text="Choose Your Course @ Aimtocode") l1.grid(column=0, row=0) cb=ttk.Combobox(win,values=course,width=10) cb.grid(column=0, row=1) cb.current(0) b=Button(win,text="Click Here",command=func) b.grid(column=0, row=2) l2=Label(win,text="") l2.grid(column=0, row=3) win.mainloop()