Keras
Keras 3 API documentation
KerasHub
Pretrained Models
T5
T5Preprocessor layer

T5Preprocessor layer

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T5Preprocessor class 

keras_hub.models.T5Preprocessor(
    tokenizer, sequence_length=256, add_start_token=False, add_end_token=True, **kwargs
)

Base class for preprocessing layers.

A Preprocessor layer provides a complete preprocessing setup for a given task. It handles tokenization, audio/image conversion, and any other necessary preprocessing steps.

This class can be subclassed similar to any keras.layers.Layer, by defining build(), call() and get_config() methods. All subclasses should set the tokenizer or audio_converter or image_converter properties during construction as needed.

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from_preset method 

T5Preprocessor.from_preset(preset, config_file="preprocessor.json", **kwargs)

Instantiate a keras_hub.models.Preprocessor from a model preset.

A preset is a directory of configs, weights and other file assets used to save and load a pre-trained model. The preset can be passed as one of:

  1. a built-in preset identifier like 'bert_base_en'
  2. a Kaggle Models handle like 'kaggle://user/bert/keras/bert_base_en'
  3. a Hugging Face handle like 'hf://user/bert_base_en'
  4. a path to a local preset directory like './bert_base_en'

For any Preprocessor subclass, you can run cls.presets.keys() to list all built-in presets available on the class.

As there are usually multiple preprocessing classes for a given model, this method should be called on a specific subclass like keras_hub.models.BertTextClassifierPreprocessor.from_preset().

Arguments

  • preset: string. A built-in preset identifier, a Kaggle Models handle, a Hugging Face handle, or a path to a local directory.

Examples

# Load a preprocessor for Gemma generation.
preprocessor = keras_hub.models.GemmaCausalLMPreprocessor.from_preset(
    "gemma_2b_en",
)
# Load a preprocessor for Bert classification.
preprocessor = keras_hub.models.BertTextClassifierPreprocessor.from_preset(
    "bert_base_en",
)

tokenizer property 

keras_hub.models.T5Preprocessor.tokenizer

The tokenizer used to tokenize strings.