polygon.py

import turtle



def get_user_input():
    userInput = raw_input("How many sides does your shape have?")
    try:
        userInput = int(userInput)
    except:
        print "Hey that's not a number!" 
        userInput = get_user_input()
            
    return userInput
    

def drawPolygon (the_turtle,num_side):
    angle = 360 / num_side
    for iter in range (num_side):
        the_turtle.forward (100)
        the_turtle.left (angle)
        
def main():
    turtle.setup (800, 800, 0, 0)
    myturtle = turtle.Turtle()
    sides = get_user_input()
    drawPolygon(myturtle,sides)

main()