import FWCore.ParameterSet.Config as cms process = cms.Process("Demo") process.load("FWCore.MessageService.MessageLogger_cfi") process.maxEvents = cms.untracked.PSet( input = cms.untracked.int32(-1) ) process.source = cms.Source("PoolSource", # replace 'myfile.root' with the source file you want to use fileNames = cms.untracked.vstring( 'file:myfile.root' ) ) process.demo = cms.EDAnalyzer('HFPedAnalyzer' ) process.p = cms.Path(process.demo)