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import FWCore.ParameterSet.Config as cms

process = cms.Process('Rivet')

process.load("FWCore.MessageLogger.MessageLogger_cfi")
process.MessageLogger.cerr.FwkReport.reportEvery = cms.untracked.int32(100)

process.load("GeneratorInterface.RivetInterface.mergedGenParticles_cfi")
process.load("GeneratorInterface.RivetInterface.genParticles2HepMC_cff")
process.load("GeneratorInterface.RivetInterface.rivetAnalyzer_cfi")

process.maxEvents = cms.untracked.PSet(
    input = cms.untracked.int32(10000)
)

# Input source
process.source = cms.Source("PoolSource",
    fileNames = cms.untracked.vstring(
        #UL18 MiniAODv2
        '/store/mc/RunIISummer20UL18MiniAODv2/TTTo2L2Nu_TuneCP5_13TeV-powheg-pythia8/MINIAODSIM/106X_upgrade2018_realistic_v16_L1v1-v1/00000/04A0B676-D63A-6D41-B47F-F4CF8CBE7DB8.root'
    ),
)

process.options = cms.untracked.PSet()

process.genParticles2HepMC.genParticles = cms.InputTag("mergedGenParticles")
process.rivetAnalyzer.HepMCCollection = cms.InputTag("genParticles2HepMC:unsmeared")

process.rivetAnalyzer.AnalysisNames = cms.vstring('MC_TTBAR', 'CMS_2018_I1662081')
process.rivetAnalyzer.OutputFile = cms.string('mcfile.yoda')
process.rivetAnalyzer.useLHEweights = True

process.p = cms.Path(process.mergedGenParticles*process.genParticles2HepMC*process.rivetAnalyzer)