code: def validate(self, direction):
      if direction not in ["left", "right", "random"]:
          raise ValueError(
              "shift_direction should be either left, right or both while {} is passed.".format(
                  direction
              )
          )
  
imports: import numpy
  from nlpaug.model.audio import Audio
label_desc: Use image node_id 1 for calling the Shift obj's underlying member method code with example usage: obj.validate(direction) without return types