Canvas - Drawing Arcs

The first code is a simple example:

import Tkinter
root    =  Tkinter.Tk()
ch, cw  =  200, 200
c1 = Tkinter.Canvas(root, height = ch, width = cw, bg = "black")
c1.create_arc(30, 30, 200, 200, start = 30, extent = 45, outline = "brown", 
fill = "yellow", width = 4)