class_docstr: Represents a vocabulary that can be built from a dataset.
code: def __len__(self):
      return len(self.vocab)
  
file_path: flax/examples/sst2/vocabulary.py
imports: import collections
  from typing import Iterable, Optional, Sequence
  from absl import logging
label_desc: Use image node_id 6 for calling the Vocabulary obj's underlying member method code with example usage: obj.__len__() and returns: len