code: def bits_per_byte(items):
      return -weighted_mean(items) / math.log(2)
  
imports: import math
  from collections.abc import Iterable
  import numpy
  import sacrebleu
  import sklearn.metrics
  import random
  from collections import defaultdict
label_desc: Use image node_id 16 for calling a global function with example usage: bits_per_byte(items) and returns: unknown