For display or attached the widget to the window screen, we have a three way in tkinter:
1. pack()
2. grid()
3. place()
from tkinter import *
#create a window screen
win=Tk()
win.geometry("400x350")
l=Label(win,text="Text at Top",fg="white",bg="blue",bd=20)
l.pack()
l=Label(win,text="Text at Left",fg="white",bg="green",bd=20)
l.pack(side=LEFT)
l=Label(win,text="Text at Right",fg="white",bg="red",bd=20)
l.pack(side=RIGHT)
l=Label(win,text="Text at Bottom",fg="white",bg="black",bd=20)
l.pack(side=BOTTOM)
#hold the screen
win.mainloop()