Trying to Understand MotorBridge.py and the Stepper Motor...

# from: Jiankia Li on MotorBridge.py from Github.com '18 and '15.

# Trying to understand my source, their source, and updating it '20.

...

# init stepper motor A
    def StepperMotorAInit(self):
        WriteByte(TB_1A_MODE,TB_SPM) #Stepper
        time.sleep(DelayTime)
        WriteHalfWord(TB_1A_DUTY,1000)    # voltage
        time.sleep(DelayTime)

    # MoveSteps > 0 CW
    # MoveSteps < 0 CCW
    # StepDelayTime : delay time for every step. uint us
    def StepperMotorAMove(self,MoveSteps,StepDelayTime):
        if MoveSteps > 0:
            WriteByte(TB_1A_DIR,TB_CW)   #CW
        else:
            WriteByte(TB_1A_DIR,TB_CCW)   #CW
            MoveSteps = -MoveSteps
        time.sleep(DelayTime)
        WriteOneWord(TB_1A_SPM_SPEED,StepDelayTime)  # unit us
        time.sleep(DelayTime)
        WriteOneWord(TB_1A_SPM_STEP,MoveSteps)
        time.sleep(DelayTime)

...

# from Jiankia Li on the Stepper.py source '15.

# And...again! Me trying to understand the source to make my ball screw move in accordance with my thinking...'20.

import MotorBridge
import time

# def StepperMotorATest():
    # print 'Hello From MotorBridge'
    # motor.StepperMotorAInit()
    # motor.StepperMotorAMove(1000,1000) # 1000 steppers  1000us every step
    # time.sleep(1)
    # motor.StepperMotorAMove(-1000,1000) # 1000 steppers  1000us every step
    # time.sleep(1)

def StepperMotorBTest():
    print('Movement!')
    motor.StepperMotorBInit()
    motor.StepperMotorBMove(1000,1000) # 1000 steppers  1000us every step
    time.sleep(1)
    motor.StepperMotorBMove(-1000,1000) # 1000 steppers  1000us every step
    time.sleep(1)


if __name__=="__main__":
    motor = MotorBridge.MotorBridgeCape()
    while True:
        #StepperMotorATest()
        StepperMotorBTest()