reduce_bg_file.py

#!/usr/bin/env python3
 
 
 
# copy a beam background simulatio file, keeping only data related to SVD.
 
import basf2 as b2
 
main = b2.create_path()
 
input = b2.register_module('RootInput')
input.param('branchNames', ['SVDSimHits', 'SVDTrueHits',
                            'SVDTrueHitsToSVDSimHits', 'BeamBackHits'])
# enter the path to the input data file(s) on your system here
input.param('inputFileName', '/data/belle2/BG/Jun2014/bg_full/Touschek_LER_100us.root')
main.add_module(input)
 
bbfilter = b2.register_module('SVDBeamBackHitFilter')
bbfilter.set_log_level(b2.LogLevel.INFO)
main.add_module(bbfilter)
 
output = b2.register_module('RootOutput')
# enter the path to the output file on your filesystem here
output.param('outputFileName', 'Touschek_LER_100us_SVD.root')
main.add_module(output)
 
 
main.add_module(b2.register_module('ProgressBar'))
 
 
b2.process(main)
 
print(b2.statistics)