code: def powspace(start, stop, pow, step):
      start = math.log(start, pow)
      stop = math.log(stop, pow)
      steps = int((stop - start + 1) // step)
      ret = torch.pow(pow, torch.linspace(start, stop, steps))
      ret = torch.unique(ret)
      return list(map(int, ret))
  
label_desc: Use image node_id 2 for calling a global function with example usage: powspace(start, stop, pow, step) and returns: list