It isn't showing up any errors- but also no circle

""" Program: 7_1.py Author: kkasp Function drawCircle -Expect Turtle object, coordinates of the circle's center point and circle's radius as arguments -Function draws circle -Draw circle's circumference by turning 3 degrees and moving a given distance, 120 times. -Calculate the distance moved with formula 2.0 * 3.14 * radius /120 """ def drawCircle (turtle, centerpoint, radius): circumference = 2 * 3.14 * (radius/120) print "The circumference moved is", circumference turtle.up() (x,y) = centerpoint[-1] turtle.turn(3) turtle.move(120) turtle.down() from turtlegraphics import Turtle turtle=Turtle() drawCircle(turtle, [(20,20)], 20)