class_docstr: Storage Structure of Topic model, including vocabulary and word topic count.
      
code: def alpha_sum(self):
      return self.__alpha_sum
  
imports: import os
  from collections import OrderedDict
  import numpy
  from tqdm import tqdm
  from paddlehub.common.logger import logger
  from slda_news.vocab import Vocab, WordCount
label_desc: Use image node_id 11 for calling the TopicModel obj's underlying member method code with example usage: obj.alpha_sum() and returns: self