pack_tkinter

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
import tkinter as tk
from tkinter import ttk




ventana = tk.Tk()
ventana.title("Posicionamiento pack")
ventana.config()

caja = ttk.Entry()
caja.pack(side=tk.LEFT)


boton = ttk.Button(text="HOLA")
boton.pack(side=tk.RIGHT, fill=tk.BOTH)



boton2 = ttk.Button(text="OTRO BOTON")
boton2.pack(before=caja, side=tk.LEFT)


boton3 = ttk.Button(text="JAJA")
boton3.pack(after=boton, padx=30, pady=50, ipadx=100, ipady=40)



ventana.mainloop()