Skip to main content

Interrupt and signal handling for Cython

Project description

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:

The cysignals package provides mechanisms to handle interrupts (and other signals and errors) in Cython code.


  • Python 2.7 or Python >= 3.4
  • Cython >= 0.28
  • Sphinx >= 1.6 (for building the documentation)
  • PARI/GP (optional; for interfacing with the PARI/GP signal handler)


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:

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for cysignals, version 1.10.3
Filename, size File type Python version Upload date Hashes
Filename, size cysignals-1.10.3.tar.gz (455.7 kB) File type Source Python version None Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring DigiCert DigiCert EV certificate Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page