Tkinter: Fitting Widgets in Layout

#https://www.youtube.com/watch?v=Ko4EPJ8DDjg&index=3&list=PL6gx4Cwl9DGBwibXFtPtflztSNPGuIB_d
from tkinter import *

root = Tk()

one = Label(root, text='One', bg='red', fg='blue') #luo objektione.pack() #pakkaa se mukaan
two = Label(root, text='Two', bg='yellow')
two.pack(fill=X)

three = Label(root, text='Three', bg='purple')
three.pack(side=LEFT, fill=Y)

root.mainloop()