Python:Trying to make a circle at a random spot, with a random radius, that is filled randomly with a set of given color. Stuck on color part

# Heres what I have so far. The colorCircle(myTurtle) doesn't seem to work and I don't really know what to do. Kinda of an amateur, any tips would be appreciated.

def drawPolygon(myTurtle,sideLength,numSides):
    turnAngle = 360/numSides
    for i in range(numSides):
        myTurtle.forward(sideLength)
        myTurtle.right(turnAngle)

def drawCircle(myTurtle,radius):
    circumference = 2 * 3.1415 * radius
    sideLength = circumference / 360
    drawPolygon(myTurtle, sideLength, 360)

def colorCircle(myTurtle):
    x = random.random()
    y = random.random()
    myTurtle.up()
    myTurtle.goto(x,y)
    myTurtle.down()
    radius = random.random()
    color = [('white',0),('yellow',1),('green',2),('blue',3),('purple',4),('red',5),('black',6),('magenta',7),('pink',8),('brown',9)]
    random.randint(0,9)
    myTurtle.begin_fill(color)
    drawCircle(myTurtle)