docstr: Get the number of words in a given job.
  
  Parameters
  ----------
  job : iterable of list of :class:`~gensim.models.doc2vec.TaggedDocument`
      Corpus chunk.
  
  Returns
  -------
  int
      Number of raw words in the corpus chunk.
code: def _raw_word_count(self, job):
      """Get the number of words in a given job.
  
      Parameters
      ----------
      job : iterable of list of :class:`~gensim.models.doc2vec.TaggedDocument`
          Corpus chunk.
  
      Returns
      -------
      int
          Number of raw words in the corpus chunk.
  
      """
      return sum(len(sentence.words) for sentence in job)
  
imports: import logging
  import os
  from collections import namedtuple, defaultdict
  from collections.abc import Iterable
  from timeit import default_timer
  from dataclasses import dataclass
  from numpy import zeros, float32, vstack, integer, dtype
  import numpy
  from gensim import utils, matutils
  from gensim.utils import deprecated
  from gensim.models import Word2Vec, FAST_VERSION
  from gensim.models.keyedvectors import KeyedVectors, pseudorandom_weak_vector
label_desc: Use image node_id 13 for calling the Doc2Vec obj's underlying member method code with example usage: obj._raw_word_count(job) and returns: sum