code: def test_janitor2():
      # Second test using a 1gram and expected the first block before the filth to have some remaining
      # characters, and the second block is longer then 200 characters so should also have some remaining.
  
      sequence = (
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "FILTH. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
      )
  
      filth = "filth"
  
      expected_result = (
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing "
          " characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
          "This is a @line #containing a certain number of characters, 76 to be exact. "
      )
  
      janitor = Janitor(
          ngram_n=1,
          window_to_remove=200,
          too_dirty_cutoff=10,
          minimum_slice_length=200,
      )
      result = janitor.clean_python(sequence)
      result = "".join(result)
      assert result == sequence
  
      janitor.register_contaminant(filth)
      assert janitor.dirt_ngrams == {filth}
  
      result = janitor.clean_python(sequence)
      result = "".join(result)
      assert result == expected_result
  
file_path: lm-evaluation-harness/tests/test_janitor.py
imports: import re
  from collections import defaultdict
  from lm_eval.decontamination.janitor import Janitor, form_ngrams, word_ngrams, split_indices, word_ngrams_indices
label_desc: Use image node_id 7 for calling a global function with example usage: test_janitor2() without return types