source: git/python/README@ a7c3c84

Explaining DelphesAnalysis:
AnalysisEvent.py -> main event class
EventSelection.py -> definition of event categories. Must be complemented for a real analysis
BaseControlPlots.py -> to be subclassed for each part of the analysis. Std schema: beginJob, process, endJob
BaseWeightClass.py -> to be subclassed for each event weight
ControlPlots.py -> main program. 
DumpEventInfo.py -> dump info about a given event.
CPconfig.py -> definition of all the components of the analysis. It sources a file provided with the configuration of each analysis.

what should be touched to implement an example?
     * config.py (name given as argument of ControlPlots or set as DelphesAnalysisCfg env var.
     * specific EventSelection class
     * specific controlPlots class(es)

In the present directory, there are two examples:
 * Simple analysis.
  - simpleConfig.py
  - SimpleEventSelection.py
  - LeptonControlPlots.py
 * Basic ttbar analysis
  - topConfig.py
  - TtbarEventSelection.py
  - TopReconstruction.py
  - JetControlPlots.py
  - LeptonControlPlots.py
  - TopControlPlots.py

Commands (starting in Delphes ROOT directory):

# setup path
. ./DelphesEnv.sh
cd python
# run the analysis
DelphesAnalysis/ControlPlots.py -i ../files/ -o controlPlots_demo.root --all -c topConfig.py
# dump a list of events in category 5 (ttbar candidates)
export DelphesAnalysisCfg="topConfig.py"
python DelphesAnalysis/DumpEventList.py 5 ../delphes_output.root 
# for each of them, print details
for i in `cat eventlist.txt| cut -d' ' -f 2`; { python DelphesAnalysis/DumpEventInfo.py $i ../delphes_output.root; }