This is a live snapshot of tasks and features we will be investing resources in. It may be used to encourage and inspire developers and to search for funding.
We aim to make it easier to interoperate with NumPy. There are many NumPy-like packages that add interesting new capabilities to the Python ecosystem, as well as many libraries that extend NumPy’s model in various ways. Work in NumPy to facilitate interoperability with all such packages, and the code that uses them, may include (among other things) interoperability protocols, better duck typing support and ndarray subclass handling.
We aim to make it much easier to extend NumPy. The primary topic here is to improve the dtype system.
Easier custom dtypes:
Simplify and/or wrap the current C-API
More consistent support for dtype metadata
Support for writing a dtype in Python
New string dtype(s):
Encoded strings with fixed-width storage (utf8, latin1, …) and/or
Variable length strings (could share implementation with dtype=object, but are explicitly type-checked)
One of these should probably be the default for text data. The current behavior on Python 3 is neither efficient nor user friendly.
np.int should not be platform dependent
Better coercion for string + number
We want to further improve NumPy’s performance, through:
Better use of SIMD instructions, also on platforms other than x86.
Reducing ufunc overhead.
Optimizations in individual functions.
Furthermore we would like to improve the benchmarking system, in terms of coverage, easy of use, and publication of the results (now here) as part of the docs or website.
Website and documentation¶
Our website (https://numpy.org) is in very poor shape and needs to be rewritten completely.
The NumPy documentation is of varying quality - in particular the User Guide needs major improvements.
Random number generation policy & rewrite¶
We intend to add new indexing modes for “vectorized indexing” and “outer indexing”, see NEP 21.
We depend on CI to discover problems as we continue to develop NumPy before the code reaches downstream users.
CI for more exotic platforms (if available as a service).
Add an official channel for numpy dev builds for CI usage by other projects so they may confirm new builds do not break their package.
MaskedArrayneeds to be improved, ideas include:
Rewrite masked arrays to not be a ndarray subclass – maybe in a separate project?
MaskedArray as a duck-array type, and/or
dtypes that support missing values
A backend system for
numpy.fft(so that e.g.
fft-mkldoesn’t need to monkeypatch numpy)
Write a strategy on how to deal with overlap between NumPy and SciPy for
fft(and implement it).