tkinter 버튼 그리기

import tkinter

tk = tkinter
window=tkinter.Tk()

def show_button():
    button_select = tk.Button(window, text="선택")
    button_next = tk.Button(window, text="다음")
    button_pre = tk.Button(window, text="이전")

    button_select.pack(side="left")
    button_next.pack(side="left")
    button_pre.pack(side="left")
show_button()

window.mainloop()