code: def get_nested_attr(self, parent, attr):
      if len(attr.split(".")) == 1:
          return getattr(parent, attr)
      else:
          attrs = attr.split(".")
          parent = getattr(parent, attrs[0])
          attr = ".".join(attrs[1:])
          attr = self.get_nested_attr(parent, attr)
          return attr
  
imports: import os
  import sys
  import importlib
  import pickle
  import lzma
  import PIL.Image
  import numpy
  import torch
label_desc: Use image node_id 6 for calling the UnitTest obj's underlying member method code with example usage: obj.get_nested_attr(parent, attr) and returns: getattr, attr