mcparticle_relations.py

#!/usr/bin/env python3
 
 
 
import basf2 as b2
from ROOT import Belle2
 
b2.logging.log_level = b2.LogLevel.ERROR
 
 
class TestModule(b2.Module):
 
    """Test to read relations."""
 
    def __init__(self):
        """constructor."""
 
        super().__init__()
 
    def event(self):
        """reimplementation of Module::event().
 
        access all relations from/to MCParticles,
        any invalid indices should be caught.
        """
 
        mcparticles = Belle2.PyStoreArray('MCParticles')
        # this will generate an index internally, checking consistency
        # (will die with a FATAL if something goes wrong)
        from_relations = mcparticles[0].getRelationsFrom("ALL")  # noqa
        to_relations = mcparticles[0].getRelationsTo("ALL")  # noqa
 
 
eventinfosetter = b2.register_module('EventInfoSetter')
eventinfosetter.param('evtNumList', [10])
 
gearbox = b2.register_module('Gearbox')
geometry = b2.register_module('Geometry')
pgun = b2.register_module('ParticleGun')
g4sim = b2.register_module('FullSim')
# make the simulation less noisy
 
main = b2.create_path()
 
main.add_module(eventinfosetter)
main.add_module(gearbox)
main.add_module(geometry)
main.add_module(pgun)
main.add_module(g4sim)
main.add_module(TestModule())
 
b2.process(main)