code: def z_inverse(x, mean, std):
      """The inverse of function z_score"""
      return x * std + mean
  
file_path: PGL/legacy/examples/stgcn/utils/math_utils.py
imports: import os
  import sys
  import time
  import argparse
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: z_inverse(x, mean, std) and returns: unknown