def scrollDisplay(self, amount):
    if amount > 0: dir = self.SHIFT_RIGHT
    else: dir = 0
    for i in range(abs(amount)):
      self.writeCommand(self.COMMAND_SHIFT | self.SHIFT_DISPLAY | dir)
Scrolls the whole display the given amount. Positive numbers scroll 
dataset/ETHPy150Open graycatlabs/PyBBIO/bbio/libraries/LiquidCrystal/LiquidCrystal.py/LiquidCrystal.scrollDisplay