CollWrite.py

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from Configurables import EvtCollectionWrite, GaudiPersistency
from Gaudi.Configuration import *
 
# Basic configuration for Gaudi persistency
GaudiPersistency()
 
FileCatalog(Catalogs=["xmlcatalog_file:ROOTIO.xml"])
 
# Input
esel = EventSelector(PrintFreq=100)
esel.Input = [
    "DATAFILE='PFN:ROOTIO.dst'  SVC='Gaudi::RootEvtSelector' OPT='READ'",
    "DATAFILE='PFN:ROOTIO.mdst' SVC='Gaudi::RootEvtSelector' OPT='READ'",
]
 
# Output
evtColl = TagCollectionSvc("EvtTupleSvc")
evtColl.Output = [
    "EvtColl DATAFILE='PFN:ROOT_IO.tags' OPT='RECREATE' SVC='Gaudi::RootCnvSvc'"
]
 
# Algorithms
algs = Gaudi__Sequencer(
    "EventAlgs", Members=[EvtCollectionWrite("Writer")], VetoObjects=["FSR"]
)
 
# Application
app = ApplicationMgr(TopAlg=[algs], EvtMax=-1, HistogramPersistency="NONE")
app.ExtSvc.append(evtColl)