import FWCore.ParameterSet.Config as cms

externalLHEProducer = cms.EDProducer("ExternalLHEProducer",
    args = cms.vstring('/cvmfs/cms.cern.ch/phys_generator/gridpacks/2017/13TeV/powheg/V2/TT_hvq/TT_hdamp_NNPDF31_NNLO_ljets.tgz'),
    nEvents = cms.untracked.uint32(5000),
    numberOfParameters = cms.uint32(1),
    outputFile = cms.string('cmsgrid_final.lhe'),
    scriptName = cms.FileInPath('GeneratorInterface/LHEInterface/data/run_generic_tarball_cvmfs.sh'),
    generateConcurrently = cms.untracked.bool(True)
)

import FWCore.ParameterSet.Config as cms
from Configuration.Generator.Pythia8CommonSettings_cfi import *
from Configuration.Generator.MCTunes2017.PythiaCP5Settings_cfi import *
from Configuration.Generator.Pythia8PowhegEmissionVetoSettings_cfi import *
from Configuration.Generator.PSweightsPythia.PythiaPSweightsSettings_cfi import *
generator = cms.EDFilter("Pythia8ConcurrentHadronizerFilter",
    maxEventsToPrint = cms.untracked.int32(1),
    pythiaPylistVerbosity = cms.untracked.int32(1),
    filterEfficiency = cms.untracked.double(1.0),
    pythiaHepMCVerbosity = cms.untracked.bool(False),
    comEnergy = cms.double(13000.),
    PythiaParameters = cms.PSet(
        pythia8CommonSettingsBlock,
        pythia8CP5SettingsBlock,
        pythia8PowhegEmissionVetoSettingsBlock,
        pythia8PSweightsSettingsBlock,
        processParameters = cms.vstring(
                'POWHEG:nFinal = 2', ## Number of final state particles
                ## (BEFORE THE DECAYS) in the LHE
                ## other than emitted extra parton
                'TimeShower:mMaxGamma = 1.0',#cutting off lepton-pair production
                ##in the electromagnetic shower
                ##to not overlap with ttZ/gamma* samples
                '6:m0 = 172.5',    # top mass'
        ),
        parameterSets = cms.vstring('pythia8CommonSettings',
            'pythia8CP5Settings',
            'pythia8PowhegEmissionVetoSettings',
            'pythia8PSweightsSettings',
            'processParameters'
        )
    )
)
ProductionFilterSequence = cms.Sequence(generator)