How to use generation of gpt2 from huggingface transformers in tensorflow keras model?
I want to use the GPT2 from huggingface transformers in tensorflow keras model definition.input_ids = tf.keras.layers.Input(
    shape=(max_len,), dtype=tf.int32, name="input_ids"
)
attention_masks = tf.keras.layers.Input(
    shape=(max_len,), dtype=tf.int32, name="attention_masks"
)
gpt2 = TFGPT2LMHeadModel.from_pretrained('gpt2')
gpt2.trainable = True

#outputs = model(inputs)
output_sequences = gpt2.generate(
    input_ids = input_ids,#inputs['input_ids'],
    attention_mask = attention_masks, #inputs['attention_mask'],
    max_length= max_len*2,
    temperature=1,
    top_k=0,
    top_p=0.9,
    repetition_penalty=1,
    do_sample=True,
    num_return_sequences=num_return_sequences
)
model = tf.keras.Model(inputs=[input_ids, attention_masks], outputs=output_sequences)however,gpt2.generatecan not take input_ids and attention_masks as inputs.The error:TypeError: Keras symbolic inputs/outputs do not implement__len__. You may be trying to pass Keras symbolic inputs/outputs to a TF API that does not register dispatching, preventing Keras from automatically converting the API call to a lambda layer in the Functional Model. This error will also get raised if you try asserting a symbolic input/output directly.How can I use generate process of gpt2 in the model ?The final goal if to calculate the loss outside, based onoutput_sequencesand update the parameters of the model which contains GPT2.