code: def get_case_identifiers(folder):
      case_identifiers = [
          i[:-4] for i in os.listdir(folder) if i.endswith("npz")
      ]
      return case_identifiers
  
file_path: medicaldetectiontoolkit/experiments/lidc_exp/pack_dataset.py
imports: import numpy
  from multiprocessing import Pool
  import os
  import subprocess
label_desc: Use image node_id 1 for calling a global function with example usage: get_case_identifiers(folder) and returns: case_identifiers