code: def __init__(self, *args, **kwargs):
      super().__init__(*args, **kwargs)
  
imports: from collections import defaultdict
  import math
  import unittest
  from gensim.models.bm25model import BM25ABC
  from gensim.models import OkapiBM25Model, LuceneBM25Model, AtireBM25Model
  from gensim.corpora import Dictionary
label_desc: Use image node_id 1 to create a new BM25Stub object from inherited base classes: BM25ABC with example: obj = BM25Stub()