Skip to content
README.rst 1.71 KiB
Newer Older
Xiaoyu Wei's avatar
Xiaoyu Wei committed
Lappy
Xiaoyu Wei's avatar
Xiaoyu Wei committed
``Lappy`` is a fork of Sophia Lin's ``lazyray`` that supports more operations beyond arithmetics.
Xiaoyu Wei's avatar
Xiaoyu Wei committed
In ``Lappy``, everything computable is considered an array object (unlike ``numpy``, it does not offer separate scalar types).
An array object has six basic components: the shape, the dtype, the expression, the value, the formal argument list, and the environment (capture list).
Scalars are special arrays with shape being an empty tuple.
If the dtype is an integer type, there can be assumptions associated with the array elements represented by an integer set (for scalars) or map (for non-scalars).

Xiaoyu Wei's avatar
Xiaoyu Wei committed
Documentation
-------------

Please visit `https://xiaoyu-wei.com/docs/lappy/`_ for the latest documentation.

Xiaoyu Wei's avatar
Xiaoyu Wei committed
Status
------

This is a list of things that can be achieved with ``lappy`` today:

- ✅ Arithmetic and scalar mathematics (lifted scalar functions / universal functions)
- ✅ Axis reordering / transpose
- ✅ Reshaping
Xiaoyu Wei's avatar
Xiaoyu Wei committed
- ✅ Broadcasting (semi-dynamic)
Xiaoyu Wei's avatar
Xiaoyu Wei committed

Xiaoyu Wei's avatar
Xiaoyu Wei committed
Scope
-----

Xiaoyu Wei's avatar
Xiaoyu Wei committed
Roadmap
*******
Xiaoyu Wei's avatar
Xiaoyu Wei committed

Xiaoyu Wei's avatar
Xiaoyu Wei committed
- ✅ Scan and fold
- ✅ Tensor contractions, like ``np.einsum`` (including dot products and matrix multiply)
Xiaoyu Wei's avatar
Xiaoyu Wei committed
- ✅ Slicing (static and dynamic)
Xiaoyu Wei's avatar
Xiaoyu Wei committed
- ✅ Fancy indexing (static and dynamic)
- ✅ Integration with Numpy's dispatch mechanism like ``__array__`` and ``__array_ufunc__``
- ✅ Some linear algebra like ``svd``, ``qr``, ``lstsq``
Xiaoyu Wei's avatar
Xiaoyu Wei committed

Xiaoyu Wei's avatar
Xiaoyu Wei committed
Anti-features
*************
Xiaoyu Wei's avatar
Xiaoyu Wei committed

Xiaoyu Wei's avatar
Xiaoyu Wei committed
- ❌ Another array IR like APL. ``lappy`` is not an IR and does not intend to be.
     It serves as a tool to build parametrized array expressions for lazy evaluation,
     and strives to provide ``numpy`` compatible APIs.
Xiaoyu Wei's avatar
Xiaoyu Wei committed

Sophia Lin's avatar
Sophia Lin committed
----
Xiaoyu Wei's avatar
Xiaoyu Wei committed
``Lappy`` is licensed under the `MIT license <http://en.wikipedia.org/wiki/MIT_License>`_ and free for commercial, academic,
Sophia Lin's avatar
Sophia Lin committed
and private use.