code: def test_weird_arpa_formats():
      # We've decided to not be picky about ARPA format
      from speechbrain.lm.arpa import read_arpa
      import io
  
      with io.StringIO() as f:
          print("Anything can be here", file=f)
          print("", file=f)
          print("\\data\\", file=f)
          print("ngram 1=2", file=f)
          print("ngram 2=3", file=f)
          # No empty line before next section
          # and starts off with 2 grams:
          print("\\2-grams:", file=f)
          print("-0.6931 a a", file=f)
          print("-0.6931 a b", file=f)
          print("-0.6931 b a", file=f)
          # No empty line before next section
          print("\\1-grams:", file=f)
          print("-0.6931 a", file=f)
          print("-0.6931 b 0.", file=f)
          # No empty line before next section
          print(
              "\\end\\", file=f
          )  # Ends whole file, this is still required
          f.seek(0)
          num_grams, ngrams, backoffs = read_arpa(f)
      assert num_grams[1] == 2
      assert num_grams[2] == 3
      assert ngrams[1][()]["a"] == -0.6931
      assert ngrams[1][()]["b"] == -0.6931
      assert ngrams[2][("a",)]["a"] == -0.6931
      assert ngrams[2][("a",)]["b"] == -0.6931
      assert ngrams[2][("b",)]["a"] == -0.6931
      assert backoffs[1][("b",)] == 0.0
      assert list(backoffs[1].keys()) == [("b",)]
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_weird_arpa_formats() without return types