code: def test_keywords(self):
      self.index.index(("AND", "OR", "EOF", "NOT"))
      self.index._index.initSearch()
      assert self.index.search(("AND", "OR", "EOF", "NOT"))[0] == 1
  
file_path: dedupe/tests/test_tfidf.py
imports: import unittest
  import dedupe
label_desc: Use image node_id 2 for calling the ParsingTest obj's underlying member method code with example usage: obj.test_keywords() without return types