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import json
import ROOT
from pprint import pprint
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-f", "--file", dest="filename",
help="open FILE and extract info", metavar="FILE")
parser.add_option("-q", "--quiet",
action="store_false", dest="verbose", default=False,
help="don't print status messages to stdout")
(options, args) = parser.parse_args()
with open(options.filename) as data_file:
data = json.load(data_file)
values = data["data"]
annotations = data["annotations"]
title = annotations["title"]
x_label = annotations["x_label"]
y_label = annotations["y_label"]
if(options.verbose):
pprint(values)
bins=len(values)
print("n. of bins",bins)
histo=ROOT.TH1F("histo",title+";"+x_label+";"+y_label,bins,values[0]['x'],values[bins-1]['x'])
for i,value in enumerate(values):
histo.SetBinContent(i+1,value['y'])
histo.SetLineColor(ROOT.kBlue)
canv=ROOT.TCanvas("c1","c1",800,800)
canv.cd()
histo.Draw()
canv.SaveAs(options.filename.replace(".json",".png"))
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