code: def __init__(
      self, corpus, tokenizer=None, k1=1.5, b=0.75, epsilon=0.25
  ):
      self.k1 = k1
      self.b = b
      self.epsilon = epsilon
      super().__init__(corpus, tokenizer)
  
imports: from nboost.plugins import Plugin
  from nboost.delegates import ResponseDelegate
  from nboost.database import DatabaseRow
  import numpy
  from multiprocessing import Pool, cpu_count
  import math
  from nltk.stem import PorterStemmer
  from nltk.tokenize import word_tokenize
  from nltk.corpus import stopwords
  import nltk
label_desc: Use image node_id 1 to create a new BM25Okapi object from inherited base classes: BM25 with example: obj = BM25Okapi(corpus, tokenizer, k1, b, epsilon)