How do you draw a star in Python, I am really confused over it now

This is the program I have so far

import helper

*helper checks if input is valid or not

import ecs10graphics07 as gr

* ecs10graphics07 is almost the same as the program Tkinter

import math

starPoints = raw_input ("Enter an odd integer:")

goodInput = helper.isFloat(starPoints)

if not goodInput:

print "Not a valid input."

raw_input ("Press enter to exit.")

winSize = 200

gr.begin_graphics(winSize,winSize,background = gr.Color.purple,title="me")

gr.set_Color(gr.Color.black)

gr.circle(x,y,radius,gr.Color.blue)

radius = 200

center = [250,250]

angle = 0

while angle < 2.0*math.pi:

x = center[0] + radius*math.cos(angle)

y = center[1] + radius*math.sin(angle)

point = [x,y]

print point

angle = angle + 25

else:

raw_input("Enter to exi")