High-performance numerical computing on ragged and nested data

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Grumpy is a Python library (Rust core) for ragged, nested, and nullable arrays — layout-first infrastructure for structural ML and general scientific computing. Mutable typed leaves, Zarr I/O, streaming batches, and optional @gr.compile fusion.

pip install grumpy

import grumpy as gr

x = gr.array([[1, 2, 3], [4, 5]], dtype=gr.int32)
print(x.mean(dim=1).to_list())  # [2.0, 4.5]

License

Business Source License 1.1 — see LICENSE and License FAQ. Copyright © Imaginary Biolabs GmbH.