Write.py

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"""
Create an Event Tag Collection based from the DST file prepared by the
"Prepare.py" options.
"""
from Gaudi.Configuration import *
from Configurables import GaudiPersistency, RndmGenSvc, TagCollectionSvc
from Configurables import Gaudi__Examples__EvtColAlg as EvtColAlg
 
GaudiPersistency()
FileCatalog(Catalogs=["xmlcatalog_file:EvtColsEx.xml"])
 
# Input
esel = EventSelector(PrintFreq=1000)
esel.Input = [
    "DATAFILE='PFN:EvtColsEx.dst'  SVC='Gaudi::RootEvtSelector' OPT='READ'"
]
 
# Output
evtColl = TagCollectionSvc("EvtTupleSvc")
evtColl.Output = [
    "EVTCOLS DATAFILE='PFN:EvtColsEx.tags' OPT='RECREATE' SVC='Gaudi::RootCnvSvc'"
]
 
app = ApplicationMgr()
app.TopAlg = [
    EvtColAlg(
        "Fill",
        # Logical unit for Event Tag Collection
        EvtColLUN="EVTCOLS")
]
app.EvtMax = -1
app.ExtSvc += [RndmGenSvc(), evtColl]