BrickPi Python

from BrickPi import *
BrickPiSetup()
BrickPi.MotorEnable[PORT_A] = 1
BrickPi.MotorEnable[PORT_B] = 1
BrickPi.MotorEnable[PORT_C] = 1
BrickPi.MotorEnable[PORT_D] = 1

while True:
    c = raw_input ("Enter Direction")
    if c == "8": #Foward
        BrickPi.MotorSpeed[PORT_A] = -230
        BrickPi.MotorSpeed[PORT_D] = -230
        BrickPiUpdateValues()

        ot = time.time()
        while(time.time() - ot < .7):
            BrickPiUpdateValues()
        time.sleep(.1)

    elif c == "2": #Reverse
        BrickPi.MotorSpeed[PORT_A] = 230
        BrickPi.MotorSpeed[PORT_D] = 230
        BrickPiUpdateValues()

        ot = time.time()
        while(time.time() - ot < .7):
            BrickPiUpdateValues()
        time.sleep(.1)

    elif c == "4": #Left
        BrickPi.MotorSpeed[PORT_A] = 230
        BrickPi.MotorSpeed[PORT_D] = -230
        BrickPiUpdateValues()

        ot = time.time()
        while(time.time() - ot < .5):
            BrickPiUpdateValues()
        time.sleep(.1)

    elif c == "6": #Right
        BrickPi.MotorSpeed[PORT_A] = -230
        BrickPi.MotorSpeed[PORT_D] = 230
        BrickPiUpdateValues()

        ot = time.time()
        while(time.time() - ot < .5):
            BrickPiUpdateValues()
        time.sleep(.1)

    elif c == "7": #Arm Up
        BrickPi.MotorSpeed[PORT_B] = 100
        BrickPiUpdateValues()

        ot = time.time()
        while(time.time() - ot < .2):
            BrickPiUpdateValues()
        time.sleep(.1)

    elif c == "9": #Arm Down
        BrickPi.MotorSpeed[PORT_B] = -100
        BrickPiUpdateValues()

        ot = time.time()
        while(time.time() - ot < .2):
            BrickPiUpdateValues()
        time.sleep(.1)