code: def crc16_hash(data):
      return crc16(encode(data))
  
imports: import sys
  import json
  import logging
  from collections import defaultdict
  import tqdm
  import redis
  from redis._compat import b, unicode, bytes, long, basestring
  from rediscluster.nodemanager import NodeManager
  from rediscluster.crc import crc16
  import argparse
  import time
  import pickle
  import numpy
  import scipy.sparse
label_desc: Use image node_id 2 for calling a global function with example usage: crc16_hash(data) and returns: crc16