code: def manipulate(self, data, start_pos, end_pos):
      aug_data = data.copy()
      aug_data[start_pos:end_pos] = -aug_data[start_pos:end_pos]
  
      return aug_data
  
imports: import numpy
  from nlpaug.model.audio import Audio
label_desc: Use image node_id 1 for calling the PolarityInversion obj's underlying member method code with example usage: obj.manipulate(data, start_pos, end_pos) and returns: aug_data