Void TSystem::ResetSignal(ESignals /*sig*/, Bool_t /*reset*/)

ROOT
1

Hi Professionals,

Could someone help me with this in Python? I need to reset the Signal.
In 5.34, I used to use:
ROOT.gSystem.ResetSignal(ROOT.kSigSegmentationViolation) It worked fine
In 6.08.06, it no longer works.
Instead, I found something in the TSystem,
what I have is
from ROOT import TSystem
TSystem.ResetSignal(ROOT.kSigSegmentationViolation, True)
I got error saying "TypeError: void TSystem::ResetSignal(ESignals sig, bool reset = kTRUE) =>
unbound method TSystem::ResetSignal must be called with a TSystem instance as first argument"
Any suggestions?
Thanks,

2

try

from ROOT import TSystem
ROOT.gSystem.ResetSignal(ROOT.kSigSegmentationViolation, True)
3

Thanks a lot for the answer. this one works. But why do I need to import TSystem here?

Also, another question: I have a gROOT.reset() right before this resetSignal(). When I run my program, it always gives me the segmentation violation Break message and terminates my program, while running w/o the gROOT.reset(), it works just fine, and no segmentation violation Break message. Do you know the reason for this?

Again, thanks for your help.

4

You probably don’t need it. (i.e was a copy/paste oversight).

I have a gROOT.reset() right before this resetSignal()

Do not use gROOT.reset() as it reset the full ROOT environment and indeed should be used very sparingly (i.e. if I recall correctly we have not investigated if gROOT.Reset is safe to use in python/PyROOT but it is unlikely to be … i.e. it is likely to remove things that PyROOT recorded/cached).

Cheers,
Philippe.

5

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.