How To Export a Python Model

Introduction

In this guide you will learn how to export a generic Python model and register it in the Model Registry.

Code

Step 1: Connect to Hopsworks

import hopsworks

project = hopsworks.login()

# get Hopsworks Model Registry handle
mr = project.get_model_registry()

Step 2: Train

Define your XGBoost model and run the training loop.

# Define a model
model = XGBClassifier()

# Train model
model.fit(X_train, y_train)

Step 3: Export to local path

Export the XGBoost model to a directory on the local filesystem.

model_file = "model.json"

model.save_model(model_file)

Step 4: Register model in registry

Use the ModelRegistry.python.create_model(..) function to register a model as a Python model. Define a name, and attach optional metrics for your model, then invoke the save() function with the parameter being the path to the local directory where the model was exported to.

# Model evaluation metrics
metrics = {'accuracy': 0.92}

py_model = mr.python.create_model("py_model", metrics=metrics)

py_model.save(model_dir)

Conclusion

In this guide you learned how to export a Python model to the Model Registry. You can also try attaching an Input Example and a Model Schema to your model to document the shape and type of the data the model was trained on.