This release is a pre-release and may not be stable for production use.
ShapeScript
A typed tensor language that compiles to PyTorch. Axis names and sizes are part of the syntax, and the checker verifies every shape before any code runs. It's einops built into a language: no pattern strings, no dim=-1, no unsqueeze, and no dropping back into Python halfway through an expression.
dim D = 768
dim H = 12
dim Dh = D / H
fn causal_attention(x: [b n D], w_qkv: [D 3*D], w_o: [D D]) -> [b n D]:
q, k, v = x @ w_qkv
|> split(b n (3 H Dh) -> b H n Dh)
att = einsum(q, k: b H n Dh, b H m Dh -> b H n m)
|> scale(1 / sqrt(Dh))
|> masked_fill(!causal[n m], -inf)
|> softmax(over=m)
return einsum(att, v: b H n m, b H m Dh -> b H n Dh)
|> rearrange(b H n Dh -> b n (H Dh))
|> matmul(w_o)
Swap two letters in the last einsum, writing b H m n for the attention weights, and PyTorch still runs it, since n and m have the same size. ShapeScript doesn't compile it: error E0408, the pattern calls axis 3 m, but m is axis 4.
This package is a pre-release. It has the compiler (shapescript), the language server (shapescript-lsp), the runtime, import of .ss files from Python and the notebook magic (%%shapescript), with prebuilt binaries for Linux (x86_64, aarch64), macOS (arm64, x86_64) and Windows (x64). It needs PyTorch:
pip install torch
pip install shapescript
shapescript check model.ss
import shapescript
shapescript.install() # then `import model` loads model.ss
The editor support is the ShapeScript extension for VS Code, on the Visual Studio Marketplace, with the language server inside it: code --install-extension shapescript.shapescript --pre-release. Other editors can run shapescript-lsp, which this package puts on the environment's PATH.
See the repository for the tour, and the language reference. Licensed under MIT or Apache-2.0, at your option.
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Release files for shapescript 0.1.4b1
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
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Built distributions (wheels)
| File | Actions Reset | |||
|---|---|---|---|---|
| shapescript-0.1.4b1-cp39-abi3-win_amd64.whl | CPython 3.9 | abi3 | Windows x86-64 | Details for shapescript-0.1.4b1-cp39-abi3-win_amd64.whl |
| shapescript-0.1.4b1-cp39-abi3-manylinux_2_28_x86_64.whl | CPython 3.9 | abi3 | Linux glibc 2.28+ x86-64 | Details for shapescript-0.1.4b1-cp39-abi3-manylinux_2_28_x86_64.whl |
| shapescript-0.1.4b1-cp39-abi3-manylinux_2_28_aarch64.whl | CPython 3.9 | abi3 | Linux glibc 2.28+ ARM64 | Details for shapescript-0.1.4b1-cp39-abi3-manylinux_2_28_aarch64.whl |
| shapescript-0.1.4b1-cp39-abi3-macosx_11_0_arm64.whl | CPython 3.9 | abi3 | macOS 11.0+ ARM64 | Details for shapescript-0.1.4b1-cp39-abi3-macosx_11_0_arm64.whl |
| shapescript-0.1.4b1-cp39-abi3-macosx_10_12_x86_64.whl | CPython 3.9 | abi3 | macOS 10.12+ x86-64 | Details for shapescript-0.1.4b1-cp39-abi3-macosx_10_12_x86_64.whl |
Total release size: 41.8 MB
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