padx pady tkinter code example
Example 1: tkinter allign
from Tkinter import * # N=North
root = Tk() # W=West E=East
# S = South
example = Label(root, text="Hello World!")
example.grid(row=1, column=1, sticky=W)
Example 2: tkinter widget span multiple colums
checkbutton.grid(columnspan=2, sticky=W)