import MotorBridgeI
from time import sleep

ServoName   =  1
Frequency   =  50

motor = MotorBridgeI.MotorBridgeCape()
motor.ServoInit(ServoName, Frequency)

for angle in ( 0, 45, 90, 135, 180, 135, 90, 45, 0 ):
    sleep( 0.5 )
    motor.ServoMoveAngle(ServoName, angle)