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[GaryHalo]

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[gemini-code-assist]

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This pull request updates the hello_many_worlds.ipynb tutorial to use newer versions of TensorFlow and TensorFlow Quantum, and configures the environment to use legacy Keras 2. A critical issue was identified in the notebook where controller.predict is called with a 1D array np.array([0, 1]), which will raise a ValueError because the model expects a 2D input of shape (batch_size, 1). This should be corrected to np.array([[0], [1]]).

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[gemini-code-assist]

The controller model expects a 2D input of shape (batch_size, 1) because it was built with commands_input having shape (None, 1). Passing a 1D array of shape (2,) via np.array([0, 1]) to controller.predict will raise a ValueError due to incompatible input dimensions. To fix this, pass a 2D array of shape (2, 1) instead.

        "controller.predict(np.array([[0], [1]]))"