How to Convert Your Adapter Model to ONNX Format

Jan 2, 2023 | Educational

In the world of deep learning and natural language processing, the ability to convert models into a universally compatible format can tremendously streamline workflows. ONNX (Open Neural Network Exchange) offers a powerful way to achieve this compatibility. In this article, we’ll explore how to convert the AdapterHub bert-base-uncased model for the SQuAD v2 dataset into ONNX format, enabling you to enhance your AI applications and deployments.

Understanding the Need for ONNX

ONNX is like a translator for various AI frameworks. Imagine trying to communicate with someone who speaks a different language. You would need a reliable translator to understand and convey messages accurately. Similarly, ONNX bridges the gap between different machine learning frameworks, allowing a model built in one framework to be executed in another without losing its effectiveness.

Steps to Convert the AdapterHub Model

Let’s walk through the process step by step.

  • Download the ONNX Model:

    First, you need to download the ONNX model using the Hugging Face Hub. Don’t forget to specify your required filename, which could be model.onnx or model_quant.onnx for quantization options.

    python
    onnx_path = hf_hub_download(repo_id="UKP-SQuARE/bert-base-uncased-pf-squad_v2-onnx", filename="model.onnx")  # or model_quant.onnx for quantization
    
  • Initialize the ONNX Model:

    Next, you will initialize the ONNX model using the InferenceSession. This helps establish the execution context for the model.

    python
    onnx_model = InferenceSession(onnx_path, providers=[CPUExecutionProvider])
    
  • Tokenizing Input:

    The next step is to tokenize your inputs using the AutoTokenizer. This is akin to preparing your words in a way that the model can understand.

    python
    tokenizer = AutoTokenizer.from_pretrained("UKP-SQuARE/bert-base-uncased-pf-squad_v2-onnx")
    inputs = tokenizer(question, context, padding=True, truncation=True, return_tensors="np")
    
  • Run the Inference:

    Finally, run the inference through the ONNX model with the processed inputs.

    python
    inputs_int64 = {key: np.array(inputs[key], dtype=np.int64) for key in inputs}
    outputs = onnx_model.run(input_feed=dict(inputs_int64), output_names=None)
    

Analyzing the Architecture

For those interested in deeper learning, the training code for this adapter can be found at GitHub. Here, you will discover configurations that can optimize your model training for various tasks.

Troubleshooting Tips

If you encounter any problems while following these steps, here are some troubleshooting ideas:

  • Ensure that you have the correct version of the libraries installed. Check the documentation for compatibility.
  • Make sure the ONNX model path is correctly specified and that the model has been successfully downloaded.
  • If inputs are causing shape errors, double-check that you are padding and truncating inputs correctly.
  • Consult the Hugging Face Documentation for additional insights into tokenizer configurations and other nuances.

For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Conclusion

By converting your models into ONNX format, you’re setting the stage for greater flexibility and deployment opportunities. It’s akin to hosting a multilingual gathering—once you break down language barriers, everyone can participate more effectively.

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.

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