code: def unscale(self, data):
      data_unscale = torch.zeros(data.size(), dtype=torch.float64)
      for i in self.scaler_index:
          value_max_abs = self.scale_[i]
          data_unscale[:, :, i] = data[:, :, i] * value_max_abs
      return data_unscale
  
imports: import torch
  import torch.nn
  from typing import List
  from sklearn.preprocessing import StandardScaler, MaxAbsScaler, MinMaxScaler, RobustScaler
  from .utils import _to_list
label_desc: Use image node_id 3 for calling the ExporWithMaxAbsScaler obj's underlying member method code with example usage: obj.unscale(data) and returns: data_unscale