code: def test_empty_search(self):
      self.index._index.initSearch()
      assert self.index.search(()) == []
  
file_path: dedupe/tests/test_tfidf.py
imports: import unittest
  import dedupe
label_desc: Use image node_id 4 for calling the ParsingTest obj's underlying member method code with example usage: obj.test_empty_search() without return types