code: def test_has_alphabet(self):
      assert isinstance(ByteLevel.alphabet(), list)
      assert len(ByteLevel.alphabet()) == 256
  
imports: import json
  import pickle
  import pytest
  from tokenizers.pre_tokenizers import BertPreTokenizer, ByteLevel, CharDelimiterSplit, Digits, Metaspace, PreTokenizer, Punctuation, Sequence, Split, UnicodeScripts, Whitespace, WhitespaceSplit
label_desc: Use image node_id 2 for calling the TestByteLevel obj's underlying member method code with example usage: obj.test_has_alphabet() without return types