code: def get_case_identifier_from_npz(case):
      case_identifier = case.split("/")[-1][:-4]
      return case_identifier
  
imports: import os
  import json
  import shutil
  import pickle
  import numpy
  import SimpleITK
  from scipy.ndimage import binary_fill_holes
  from multiprocessing import Pool
  from collections import OrderedDict
  from .path_utils import join_paths
label_desc: Use image node_id 7 for calling a global function with example usage: get_case_identifier_from_npz(case) and returns: case_identifier