code: def test_instantiate(self):
      assert Digits() is not None
      assert isinstance(Digits(), PreTokenizer)
      assert isinstance(Digits(), Digits)
      assert isinstance(Digits(True), Digits)
      assert isinstance(Digits(False), Digits)
      assert isinstance(pickle.loads(pickle.dumps(Digits())), Digits)
  
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 1 for calling the TestDigits obj's underlying member method code with example usage: obj.test_instantiate() without return types