class_docstr: Dataset
      
code: def z_inverse(self, type):
      return self.__data[type] * self.std + self.mean
  
file_path: PGL/legacy/examples/stgcn/data_loader/data_utils.py
imports: import numpy
  import pandas
  from utils.math_utils import z_score
label_desc: Use image node_id 5 for calling the Dataset obj's underlying member method code with example usage: obj.z_inverse(type) and returns: unknown