code: def sanitize(x):
      """convert array to a c-contiguous float array"""
      return np.ascontiguousarray(x.astype("float32"))
  
imports: from __future__ import print_function
  import numpy
  import time
  import os
  import sys
  import faiss
  import re
  from multiprocessing.pool import ThreadPool
  from datasets import ivecs_read
label_desc: Use image node_id 5 for calling a global function with example usage: sanitize(x) and returns: np