Virtual package python3-cysignals is provided by:
Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture +++-======================-==============-==================================== un python3-cysignals-bare <none> <none> (no description available) ii python3-cysignals-pari 1.11.2+ds-2+b1 amd64 interrupt and signal handling for Cython -- Python 3 - PARI/GP 2 packages