pyspqr: Simple Python Wrapper for SuiteSparseQR
import scipy as sp
from pyspqr import qr
A = sp.sparse.random(1000, 1000, format='csc')
Q, R, E = qr(A)Where Q is an orthogonal linear operator represented by Householder reflections plus a permutation, R is a sparse upper triangular matrix, and E is a permutation linear operator. They are used as follows:
import numpy as np
from scipy.sparse.linalg import spsolve, spsolve_triangular
x = np.random.randn(1000)
assert np.allclose(Q @ (R @ (E @ x)), A @ x)
assert np.allclose(
E.T @ spsolve_triangular(R, Q.T @ x, lower=False),
spsolve(A, x)
)We are working on offering an easy interface when the input matrix is not square and/or not full rank, and the user is interested in a least-squares or minimum-norm solution. (It’s already doable also in those cases with the current outputs, but it’s not too user-friendly.)
Installation
pip install pyspqrWe publish compiled wheels in PyPI for all the major platforms, including Windows and ARM64 Linux. See here for all platforms and architectures available. They “just work”.
We use ABI3 reduced Python3 API and the newer Numpy2 ABI, so the wheels run on any Python greater or equal than 3.6, both with Numpy 1 and 2.
Wheels ship bundled with the latest version of SuiteSparse, compiled in CI/CD by this repository, and also include an optimized multi-threaded OpenBLAS, which is used by SuiteSparse for supernodal operations.
1 maintainer
Metadata
1 maintainer
Release files for pyspqr 0.2.0
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| pyspqr-0.2.0.tar.gz | 26.4 kB | With provenance | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| pyspqr-0.2.0-cp36-abi3-win_amd64.whl | CPython 3.6 | abi3 | Windows x86-64 | Details |
| pyspqr-0.2.0-cp36-abi3-musllinux_1_2_x86_64.whl | CPython 3.6 | abi3 | Linux musl 1.2+ x86-64 | Details |
| pyspqr-0.2.0-cp36-abi3-manylinux_2_28_aarch64.whl | CPython 3.6 | abi3 | Linux glibc 2.28+ ARM64 | Details |
| pyspqr-0.2.0-cp36-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl | CPython 3.6 | abi3 | Linux glibc 2.17+ x86-64 | Details |
| pyspqr-0.2.0-cp36-abi3-macosx_14_0_arm64.whl | CPython 3.6 | abi3 | macOS 14.0+ ARM64 | Details |
| pyspqr-0.2.0-cp36-abi3-macosx_11_0_arm64.whl | CPython 3.6 | abi3 | macOS 11.0+ ARM64 | Details |
| pyspqr-0.2.0-cp36-abi3-macosx_10_9_x86_64.whl | CPython 3.6 | abi3 | macOS 10.9+ x86-64 | Details |
Total release size: 44.4 MB
Release files / pyspqr-0.2.0.tar.gz
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