Update simple demo

[jeffcarp]

• Rename to simple_demo.py
• Make CPU by default to ensure it runs without having a NodePool set up
• Fix import
• Return loss instead of string

[gemini-code-assist]

Summary of Changes

Hello @jeffcarp, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the Keras JAX demo by renaming the script for better identification, configuring it to run on CPU by default for broader accessibility, and improving the output by returning the actual training loss. These changes make the demo more straightforward to execute and provide more relevant feedback on its operation.

Highlights

• File Renaming: The demo script examples/demo_train.py has been renamed to examples/simple_demo.py for clarity.
• Default Accelerator: The default accelerator for the keras_remote.run decorator has been changed from 'v2-8' to 'cpu' to ensure the demo runs without requiring a specific NodePool setup.
• Import Statement Fix: The import statement for keras_remote was simplified from from keras_remote import core as keras_remote to import keras_remote.
• Return Value Change: The train_keras_jax_model function now returns the final training loss instead of a descriptive string, and the main execution block prints this loss.

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Changelog

• examples/simple_demo.py
  • Renamed from examples/demo_train.py.
  • Updated the keras_remote import statement.
  • Changed the accelerator parameter in @keras_remote.run from 'v2-8' to 'cpu'.
  • Removed socket import and host-related print statements.
  • Modified the train_keras_jax_model function to return the final training loss.
  • Updated the main execution block to print the final training loss.

Activity

• No human activity has been recorded on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request updates the simple demo by renaming it, changing the default accelerator to 'cpu' for broader accessibility, fixing an import statement for better clarity, and improving the function's return value from a string to a more useful training loss. My feedback focuses on improving documentation by adding a docstring, as recommended by the repository's style guide.

[gemini-code-assist]

This function is missing a docstring. The repository style guide emphasizes the importance of documentation. Adding a docstring would improve the clarity and maintainability of this example.

Suggested change

	def train_keras_jax_model():
	def train_keras_jax_model():
	"""Trains a simple Keras model remotely and returns the final loss."""

References

1. The style guide states: "Don't neglect error messages, docstrings, and documentation." ^(link)