Wii Nunchuk Mouse

from pymouse import PyMouse
import serial

serialPort = raw_input("Serial port: ")
try:
    ser = serial.Serial(serialPort, 19200)
    ser.timeout = None
except serial.SerialException:
    print "No device connected. Exiting..."
    time.sleep(1)
    sys.exit()

sensibility = 10.0
if ((userSens = raw_input("Sensibility (leave blank for default value 10): ")) != ""):
    sensibility = float(userSens)

mouse = PyMouse()
zClicked = False

while True:
    if (ser.inWaiting() > 0):
        try:
            # Read input
            # Input format: "analogX analogY cBtn zBtn
            nunchukInput = ser.readline().split()
            if(len(nunchukInput) < 4):
                continue
            try:
                nX = int(nunchukInput[0])
                nY = int(nunchukInput[1])
                cBtn = int(nunchukInput[2])
                zBtn = int(nunchukInput[3])
            except ValueError:
                continue

            currX = mouse.position()[0]
            currY = mouse.position()[1]
            moveX = moveY = 0

            # X coord
            if((nX >= 90) and (nX < 140)):
                moveX = 0
            elif((nX >= 40) and (nX < 90)):
                moveX = -0.5
            elif(nX < 40):
                moveX = -1
            elif((nX >= 140) and (nX < 170)):
                moveX = 0.5
            elif(nX >= 170):
                moveX = 1

            # Y coord
            if((nY >= 100) and (nY < 150)):
                moveY = 0
            elif((nY >= 60) and (nY < 100)):
                moveY = 0.5
            elif(nY < 60):
                moveY = 1
            elif((nY >= 150) and (nY < 180)):
                moveY = -0.5
            elif(nY >= 180):
                moveY = -1

            # Move
            newX = currX + sensibility*moveX
            newY = currY + sensibility*moveY
            mouse.move(newX, newY)

            # Click
            if(cBtn and zBtn and (not zBtn)):
                mouse.click(newX, newY, 3)
                zClicked = False
            elif(cBtn):
                mouse.click(newX, newY, 1)
                zClicked = False
            elif(zBtn and (not zClicked)):
                mouse.click(newX, newY, 2)
                zClicked = True
        except serial.serialutil.SerialException:
            pass