code: def encode(value):
      """
      Return a bytestring representation of the value.
      This method is copied from Redis' connection.py:Connection.encode
      """
      if isinstance(value, bytes):
          return value
      elif isinstance(value, (int, long)):
          value = b(str(value))
      elif isinstance(value, float):
          value = b(repr(value))
      elif not isinstance(value, basestring):
          value = unicode(value)
      if isinstance(value, unicode):
          value = value.encode("utf-8")
      return value
  
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 1 for calling a global function with example usage: encode(value) and returns: value, value