Einsum in 40 Lines of Python

1. einops

   1 22 8,802 7.6 Python

   Flexible and powerful tensor operations for readable and reliable code (for pytorch, jax, TF and others)

   

   See also https://github.com/arogozhnikov/einops

   Having used these (mostly translating code that used them) I see the power and benefit. I also find it takes a lot of mentally energy to get my head around them and makes readability harder.

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3. ten

   2 2 6 5.7 Python

   A statically typed tensor programming language for defining AI models. (by lukehoban)

   

   I played around with the idea of a language motivated by this same thought process last year: https://github.com/lukehoban/ten.

   > Ten has the following features:

4. TensorOperations.jl

   3 3 496 7.4 Julia

   Julia package for tensor contractions and related operations

   

5. array

   4 5 200 3.6 C++

   C++ multidimensional arrays in the spirit of the STL

   

   I wrote a library in C++ (I know, probably a non-starter for most reading this) that I think does most of what you want, as well as some other requests in this thread (generalized to more than just multiply-add): https://github.com/dsharlet/array?tab=readme-ov-file#einstei....

   A matrix multiply written with this looks like this:

       enum { i = 2, j = 0, k = 1 };

6. Pytorch

   5 384 88,230 10.0 Python

   Tensors and Dynamic neural networks in Python with strong GPU acceleration

   

   PyTorch also has some support for them, but it's quite incomplete and has many issues so that it is basically unusable. And its future development is also unclear. https://github.com/pytorch/pytorch/issues/60832

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