how to pass in a turtle module with an existing function (python/turtle)

I tried to pass in a turtle, I know what I've done didn't make sense so far but I just trying to make a turtle run as x and y cor, I couldn't figure out how to change them.

def takeOnePaStep():
    direction = random.randint(0,3)
    if direction == 0:
        return (0,1)
    elif direction == 1:
        return (1,0)
    elif direction == 2:
        return (0,-1)
    elif direction == 3:
        return (-1,0)


def randomWalkPa(Pa_steps):
    pa = [0,0]
    for _ in range (Pa_steps):
        nextStep = takeOnePaStep()
        pa[0] += nextStep[0]
        pa[1] += nextStep[1]
    pasDistance = hypot(pa[0],pa[1])
    return pasDistance

    for _ in  range (Pa_steps):
        Pa = turtle.Turtle()
        Pa.shape("circle")
        Pa.pensize(1)
        Pa.speed(0)
        Pa.goto(pa[0],pa[1])

This part right here, I feel like they can represent as x and y var but I'm really stuck on how to call them

pa[0] += nextStep[0]
pa[1] += nextStep[1]