class_docstr: Abstract class for building a vocabulary from a dataset.
class_docstr_tok: ["Abstract","class","for","building","a","vocabulary","from","a","dataset","."]
docstr: Loads vocabulary from the specified file
  
  Parameters
  ----------
  fname: str
      Path containing pre-build vocabulary.
docstr_tok: ["Loads","vocabulary","from","the","specified","file","Parameters","--","--","--","--","--","fname",":","str","Path","containing","pre-build","vocabulary","."]
code: def load(cls, fname: str):
      """Loads vocabulary from the specified file
  
      Parameters
      ----------
      fname: str
          Path containing pre-build vocabulary.
      """
      raise NotImplementedError()
  
imports: from deepchem.data import Dataset
label_desc: Use image node_id 2 for calling the VocabularyBuilder obj's underlying member method code with example usage: obj.load(cls, fname) without return types