https://blog.gslin.org/archives/2026/03/19/12941/%e5%be%88%e5%a4%9a-python-%e5%8a%a0%e9%80%9f%e7%9a%84%e6%96%b9%e6%b3%95/

很多 Python 加速的方法

#c #code #codon #compiler #cpython #cython #graalpy #jax #mojo #mypyc #native #numba #numpy #performance #pyo3 #pypy #python #rust #speed #taichi

Can't figure out how to use #cython to define a reusable #python extension class.

In the .pxd

cdef class CountFingerprint:
cdef:
...

In the .pyx

from . import _typing

def _err(s):
return ValueError(s)

cdef class CountFingerprint:
def to_pandas(...) -> _typing.PDF:
..
raise _get_value_error(..)

cythonize says "Unknown type declaration '_typing.PDF' in annotation, ignoring" and "undeclared name not builtin: _get_err".

I don't get it. Those are defined in the .pyx.

Help?

#borgbackup 2.0.0b20 was just released!

There is quite some new stuff and also some fixes, please help with testing the betas!

https://github.com/borgbackup/borg/releases/tag/2.0.0b20

#backup #linux #bsd #macOS #openindiana #haiku #python #cython #borg

🐍👨‍💻 #PythoC — це новий проєкт, який дозволяє використовувати Python як генератор C-коду, пропонуючи більше можливостей і гнучкості, ніж #Cython. Це перший огляд нового інструмента генерації C-коду з #Python, орієнтованого передусім на створення самостійних C-програм.

🔗 https://proit.ua/pythoc-novi-mozhlivosti-ghienieratsiyi-c-kodu/
🔗 https://www.infoworld.com/article/4101101/pythoc-a-new-way-to-generate-c-code-from-python.html

Does anyone know of a good overview how much overhead using ctypes to call functions from a dynamic library adds to #python code instead of building a native extension e.g via #cython #pybind11 or #nanobind ?

A blog post with some statistics would be perfect but just ballpark figures from anyone who knows what they are talking about is fine

I have officially started working as the training coordinator at #MimerAIF (https://mimer-ai.eu/). What better way to kick things off than a course?! These days I am teaching parts of the #PythonForScicomp course in partnership with @coderefinery and @SciCompAalto.

Tomorrow is the last day of the course, but you can still join!

https://scicomp.aalto.fi/training/scip/python-for-scicomp-2025/

I will be covering the episodes on #Cython and #Packaging.

Fuzzing pyhacl (https://codeberg.org/drlazor8/pyhacl), a package of Cython bindings for HACL* (the High Assurance Cryptographic Library), with fusil we only found one crash.

It turned out to actually be a silly bug in #Cython:

Issue: https://github.com/cython/cython/issues/7263

Fix: https://github.com/cython/cython/pull/7264

Goes to show how fuzzing a C-extension can uncover crashes in many different layers.

Thanks @drlazor8 for taking up the call for C-extensions maintainers to fuzz their code.

#fusil #Python #pyhacl #hacl #fuzzing #fuzzer