This geometry manager organizes widgets in blocks before placing them in the parent widget.

Syntax:

widget.pack( pack_options )

Here is the list of possible options:

• expand: When set to true, widget expands to fill any space not otherwise used in widget's parent.

• fill: Determines whether widget fills any extra space allocated to it by the packer, or keeps its own minimal dimensions: NONE (default), X (fill only horizontally), Y (fill only vertically), or BOTH (fill both horizontally and vertically).

• side: Determines which side of the parent widget packs against: TOP (default), BOTTOM, LEFT, or RIGHT.

Example:

Try following example by moving cursor on different buttons:

from Tkinter import *root = Tk()frame = Frame(root)frame.pack()bottomframe = Frame(root)bottomframe.pack( side = BOTTOM )redbutton = Button(frame, text="Red", fg="red")redbutton.pack( side = LEFT)greenbutton = Button(frame, text="Brown", fg="brown")greenbutton.pack( side = LEFT )bluebutton = Button(frame, text="Blue", fg="blue")bluebutton.pack( side = LEFT )blackbutton = Button(bottomframe, text="Black", fg="black")blackbutton.pack( side = BOTTOM)root.mainloop()