code: def test_instantiate(self, roberta_files):
      assert isinstance(BPE(), Model)
      assert isinstance(BPE(), BPE)
  
      vocab = {"a": 0, "b": 1, "ab": 2}
      merges = [("a", "b")]
      assert isinstance(BPE(vocab, merges), Model)
      assert isinstance(
          BPE.from_file(
              roberta_files["vocab"], roberta_files["merges"]
          ),
          BPE,
      )
      with pytest.raises(
          ValueError,
          match="`vocab` and `merges` must be both specified",
      ):
          BPE(vocab=vocab)
      with pytest.raises(
          ValueError,
          match="`vocab` and `merges` must be both specified",
      ):
          BPE(merges=merges)
  
      assert isinstance(
          pickle.loads(pickle.dumps(BPE(vocab, merges))),
          BPE,
      )
  
      # Deprecated calls in 0.9
      with pytest.deprecated_call():
          assert isinstance(
              BPE(roberta_files["vocab"], roberta_files["merges"]),
              Model,
          )
  
      with pytest.raises(
          ValueError,
          match="`vocab` and `merges` must be both specified",
      ):
          BPE(vocab=roberta_files["vocab"])
      with pytest.raises(
          ValueError,
          match="`vocab` and `merges` must be both specified",
      ):
          BPE(merges=roberta_files["merges"])
      with pytest.deprecated_call():
          assert isinstance(
              pickle.loads(
                  pickle.dumps(
                      BPE(
                          roberta_files["vocab"],
                          roberta_files["merges"],
                      )
                  )
              ),
              BPE,
          )
  
file_path: hf-tokenizers/bindings/python/tests/bindings/test_models.py
imports: import pickle
  import pytest
  from tokenizers.models import BPE, Model, WordLevel, WordPiece
  from ..utils import bert_files, data_dir, roberta_files
label_desc: Use image node_id 1 for calling the TestBPE obj's underlying member method code with example usage: obj.test_instantiate(roberta_files) without return types