Add direct penzai.treescope support for NNX objects. #3948
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This change implements the `__penzai_repr__` protocol on most NNX objects, making it possible to directly visualize them using the standard `penzai.treescope` configuration without an extra conversion step. Modules, GraphDefs, and States are all visualizable. The `nnx.display` function is no longer needed if Penzai is installed, since `pz.ts.basic_interactive_setup()` followed by `IPython.display.display` or `pz.show` (or just returning an object from an IPython cell) is now sufficient to visualize NNX objects. Also fixes GraphDef __repr__ to use "leaves" instead of "variables". PiperOrigin-RevId: 638280968
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Add direct penzai.treescope support for NNX objects.
This change implements the
__penzai_repr__protocol on most NNXobjects, making it possible to directly visualize them using the
standard
penzai.treescopeconfiguration without an extra conversionstep. Modules, GraphDefs, and States are all visualizable.
The
nnx.displayfunction is no longer needed if Penzai is installed,since
pz.ts.basic_interactive_setup()followed byIPython.display.displayorpz.show(or just returning an objectfrom an IPython cell) is now sufficient to visualize NNX objects.
Also fixes GraphDef repr to use "leaves" instead of "variables".