code: def _random_generator(seed_or_generator):
      if isinstance(seed_or_generator, random.Random):
          return seed_or_generator
      return random.Random(seed_or_generator)
  
imports: import random
  import warnings
  from abc import ABCMeta, abstractmethod
  from bisect import bisect
  from itertools import accumulate
  from nltk.lm.counter import NgramCounter
  from nltk.lm.util import log_base2
  from nltk.lm.vocabulary import Vocabulary
label_desc: Use image node_id 2 for calling a global function with example usage: _random_generator(seed_or_generator) and returns: random, seed_or_generator