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#!/usr/bin/env python
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import sys, os, string, re, copy
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from optparse import OptionParser
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from ROOT import *
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def main():
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# usage description
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usage = "Usage: getPileUpDistribution.py [options] \nExample: ./getPileUpDistribution.py -i PileUp_dist.root"
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# input parameters
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parser = OptionParser(usage=usage)
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parser.add_option("-i", "--input_file", dest="input_file",
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help="Input pile-up distribution file",
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metavar="INPUT_FILE")
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parser.add_option("-o", "--output_file", dest="output_file",
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help="Output pile-up distribution file",
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metavar="OUTPUT_FILE")
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(options, args) = parser.parse_args()
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# make sure all necessary input parameters are provided
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if not options.input_file:
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print usage
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sys.exit()
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file = TFile(options.input_file)
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histo = file.Get('pileup')
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bin_content = []
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for i in range(1,histo.GetNbinsX()):
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bin_content.append(histo.GetBinContent(i))
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print bin_content
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if __name__ == "__main__":
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main()
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