Class: Informers::AutoTokenizer

Inherits:
Object
  • Object
show all
Defined in:
lib/informers/tokenizers.rb

Constant Summary collapse

TOKENIZER_CLASS_MAPPING = 
{
  "BertTokenizer" => BertTokenizer,
  "DebertaV2Tokenizer" => DebertaV2Tokenizer,
  "DistilBertTokenizer" => DistilBertTokenizer,
  "RobertaTokenizer" => RobertaTokenizer,
  "XLMRobertaTokenizer" => XLMRobertaTokenizer,
  "MPNetTokenizer" => MPNetTokenizer
}

Class Method Summary collapse

Class Method Details

.from_pretrained(pretrained_model_name_or_path, quantized: true, progress_callback: nil, config: nil, cache_dir: nil, local_files_only: false, revision: "main", legacy: nil, **kwargs) ⇒ Object 



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# File 'lib/informers/tokenizers.rb', line 113

def self.from_pretrained(
  pretrained_model_name_or_path,
  quantized: true,
  progress_callback: nil,
  config: nil,
  cache_dir: nil,
  local_files_only: false,
  revision: "main",
  legacy: nil,
  **kwargs
)
  tokenizer_json, tokenizer_config = load_tokenizer(
    pretrained_model_name_or_path,
    quantized:,
    progress_callback:,
    config:,
    cache_dir:,
    local_files_only:,
    revision:,
    legacy:
  )

  # Some tokenizers are saved with the "Fast" suffix, so we remove that if present.
  tokenizer_name = tokenizer_config["tokenizer_class"]&.delete_suffix("Fast") || "PreTrainedTokenizer"

  cls = TOKENIZER_CLASS_MAPPING[tokenizer_name]
  if !cls
    warn "Unknown tokenizer class #{tokenizer_name.inspect}, attempting to construct from base class."
    cls = PreTrainedTokenizer
  end
  cls.new(tokenizer_json, tokenizer_config)
end

.load_tokenizer(pretrained_model_name_or_path, **options) ⇒ Object 



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# File 'lib/informers/tokenizers.rb', line 146

def self.load_tokenizer(pretrained_model_name_or_path, **options)
  info = [
    Utils::Hub.get_model_file(pretrained_model_name_or_path, "tokenizer.json", true, **options),
    Utils::Hub.get_model_json(pretrained_model_name_or_path, "tokenizer_config.json", true, **options),
  ]

  # Override legacy option if `options.legacy` is not null
  if !options[:legacy].nil?
    info[1]["legacy"] = options[:legacy]
  end
  info
end