cysignals: interrupt and signal handling for Cython
Cython and interrupts
When writing Cython code, special care must be taken to ensure that the code can be interrupted with CTRL-C. Since Cython optimizes for speed, Cython normally does not check for interrupts. For example, code like the following cannot be interrupted in Cython:
while True:
pass
The cysignals package provides mechanisms to handle interrupts (and other signals and errors) in Cython code.
Requirements
Python >= 3.13
Cython >= 3.1
Sphinx >= 1.6 (for building the documentation)
Links
cysignals on the Python package index: https://pypi.org/project/cysignals/
cysignals code repository and issue tracker on GitHub: https://github.com/sagemath/cysignals
full cysignals documentation on Read the Docs: http://cysignals.readthedocs.io/
Changelog
1.13.0 (2026-09-28)
support Python 3.14t and Python 3.15, support arm64 Linux and Windows, improve CI
1.12.6 (2025-10-29)
support Python 3.14, drop old versions support, fix PyPI deployment
1.12.0 (release candidate)
Remove optional compile-time dependency on PARI/GP. [#166]
1.11.4 (2023-10-07)
Include generated configure script in the sdist again.
1.11.3 (2023-10-04)
Add support for Cython 3. [#174, #176, #182, #187]
Add support for Python 3.12.
Replace fprintf by calls to write, which is async-signal-safe according to POSIX. [#162]
Introduce a general hook to interface with custom signal handling. [#181]
1.11.2 (2021-12-15)
Drop assembly code added after 1.10.3 that is not portable.
1.11.0 (2021-11-26)
Drop Python 2 support; bump minimum Python version to 3.6. [#142]
Fixed compilation with glib 3.34. [#151]
Improved testing. [#139, #152, #154]
1.10.3 (2021-03-16)
Improved installation of cysignals with pip install -e. [#130]
Fixed compilation of OpenMP modules that also use cysignals. [#128]
Fixed segmentation fault that could occur when sig_occurred() is called recursively during garbage collection. [#127]
Improved error reporting of signals that occurred inside sig_on() as opposed to outside them.
Fixed bug in the cysignals_example package. [#113]
For changes in previous releases, see the best source available is to compare git tags: https://github.com/sagemath/cysignals/tags
7 maintainers
Release files for cysignals 1.13.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| cysignals-1.13.0.tar.gz | 77.4 kB | Details |
Built distributions (wheels)
Total release size: 5.1 MB
Release files / cysignals-1.13.0.tar.gz
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| Tags | Source |
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Transparency logRelease files / cysignals-1.13.0-cp313-cp313-musllinux_1_2_x86_64.whl
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