def __init__(self, channels, baseCutSet, inFile, outfile='./results/output.root',
maxEvents=float("inf"), intLumi=10000, rowCleaner='',
cutModifiers=[], ntupleDir='ntuple'):
'''
channels: list of strings or single string in the format (e.g.) eemm for
a 2e2mu final state. '4l', 'zz' and 'ZZ' turn into ['eeee' 'eemm' 'mmmm']
cutSet: string with the name of the cut template to use
infile: string of an input file name, with path
outfile: string of an output file name, with path
maxEvents: stop after this many events processed
intLumi: in output text file, report how many events we would expect for this integrated luminosity
rowCleaner: name of a module to clean out redundant rows. If an empty
string (or other False boolean), no cleaning is performed.
'''
self.cutSet = [baseCutSet]+cutModifiers
CutClass = getCutClass(baseCutSet, *cutModifiers)
self.cuts = CutClass()
self.outFile = outfile
self.cutOrder = self.cuts.getCutList()
self.sample = inFile.split('/')[-1].replace('.root','')
self.inFile = root_open(inFile)
assert bool(inFile), 'No file %s'%self.inFile
self.maxEvents = maxEvents
# if we don't use all the events, we need to know how many we would have done in the whole thing
if self.maxEvents < float('inf'):
self.ntupleSize = {}
self.channels = parseChannels(channels)
self.ntuples = {}
for channel in parseChannels(channels):
try:
nt = self.inFile.Get('/'.join([channel,ntupleDir]))
# if not nt.GetEntries():
# raise DoesNotExist('')
self.ntuples[channel] = nt
nt.create_buffer()
except DoesNotExist:
print "Ntuple for channel %s is empty or not found! Skipping."%channel
self.channels.remove(channel)
continue
if self.maxEvents < float('inf'):
self.ntupleSize[channel] = self.ntuples[channel].GetEntries()
self.results = NtupleCopier(self.outFile, **self.ntuples)
self.prepareCutSummary()
self.intLumi = intLumi
self.cleanRows = bool(rowCleaner)
if self.cleanRows:
self.CleanerClass = getCleanerClass(rowCleaner)
class Analyzer(object):
def __init__(self, channels, baseCutSet, inFile, outfile='./results/output.root',
maxEvents=float("inf"), intLumi=10000, rowCleaner='',
cutModifiers=[], ntupleDir='ntuple'):
'''
channels: list of strings or single string in the format (e.g.) eemm for
a 2e2mu final state. '4l', 'zz' and 'ZZ' turn into ['eeee' 'eemm' 'mmmm']
cutSet: string with the name of the cut template to use
infile: string of an input file name, with path
outfile: string of an output file name, with path
maxEvents: stop after this many events processed
intLumi: in output text file, report how many events we would expect for this integrated luminosity
rowCleaner: name of a module to clean out redundant rows. If an empty
string (or other False boolean), no cleaning is performed.
'''
self.cutSet = [baseCutSet]+cutModifiers
CutClass = getCutClass(baseCutSet, *cutModifiers)
self.cuts = CutClass()
self.outFile = outfile
self.cutOrder = self.cuts.getCutList()
self.sample = inFile.split('/')[-1].replace('.root','')
self.inFile = root_open(inFile)
assert bool(inFile), 'No file %s'%self.inFile
self.maxEvents = maxEvents
# if we don't use all the events, we need to know how many we would have done in the whole thing
if self.maxEvents < float('inf'):
self.ntupleSize = {}
self.channels = parseChannels(channels)
self.ntuples = {}
for channel in parseChannels(channels):
try:
nt = self.inFile.Get('/'.join([channel,ntupleDir]))
# if not nt.GetEntries():
# raise DoesNotExist('')
self.ntuples[channel] = nt
nt.create_buffer()
except DoesNotExist:
print "Ntuple for channel %s is empty or not found! Skipping."%channel
self.channels.remove(channel)
continue
if self.maxEvents < float('inf'):
self.ntupleSize[channel] = self.ntuples[channel].GetEntries()
self.results = NtupleCopier(self.outFile, **self.ntuples)
self.prepareCutSummary()
self.intLumi = intLumi
self.cleanRows = bool(rowCleaner)
if self.cleanRows:
self.CleanerClass = getCleanerClass(rowCleaner)
def prepareCutSummary(self):
'''
Prepare dictionary with number of events passing each cut for each channel.
If redundant row cleaning is done, an extra item will be added later (not here)
'''
self.cutsPassed = {}
for channel in self.channels:
self.cutsPassed[channel] = {}
for cut in self.cutOrder:
self.cutsPassed[channel][cut] = 0
def analyze(self):
'''
For a given file, do the whole analysis and output the results to
self.outFile
'''
if self.cleanRows:
# For events with more than 4 leptons, FSA Ntuples just have one
# row for each possible combination of objects. We have to know
# which one is the right one. Can do this before or after other cuts
rowCleaner = self.CleanerClass(self.cuts)
cleanAfter = rowCleaner.cleanAfter()
if not cleanAfter:
for channel in self.channels:
self.cutsPassed[channel]["TotalRows"] = 0 # hold number of rows pre-cleaning
rowCleaner.setChannel(channel)
for iRow, row in enumerate(self.ntuples[channel]):
if iRow == self.maxEvents:
break
if (iRow % 5000) == 0:
print "%s: Finding redundant rows for %s row %d"%(self.sample, channel, iRow)
rowCleaner.bookRow(row, iRow)
rowCleaner.finalize()
else:
cleanAfter = False
for channel in self.channels:
objectTemplate = mapObjects(channel)
objects = objectTemplate
needReorder = self.cuts.needReorder(channel)
if cleanAfter:
rowCleaner.setChannel(channel)
self.cutsPassed[channel]["SelectBest"] = 0
self.ntuples[channel].SetBranchStatus('*', 0)
for branch in self.ntuples[channel].iterbranchnames():
for pattern in self.cuts.branchesNeeded:
if pattern.match(branch):
self.ntuples[channel].SetBranchStatus(branch, 1)
break
iRow = -1 # in case of empty ntuple
# Loop through and do the cuts
for iRow, row in enumerate(self.ntuples[channel]):
# If we've hit maxEvents, we're done
if iRow == self.maxEvents:
print "%s: Reached %d %s rows, ending"%(self.sample, self.maxEvents, channel)
break
if self.cleanRows:
if not cleanAfter:
# Always pass "TotalRows" because it's always a new row
self.passCut(row, channel, "TotalRows")
# Ignore wrong version of event (if we're cleaning now)
if rowCleaner.isRedundant(row, channel, iRow):
continue
# Report progress every 5000 rows
if iRow % 5000 == 0:
print "%s: Processing %s row %d"%(self.sample, channel, iRow)
if needReorder:
objects = self.cuts.orderLeptons(row, channel, objectTemplate)
evPass = True
for cut in self.cutOrder:
self.preCut(row, channel, cut)
if self.cuts.analysisCut(row, cut, *objects):
self.passCut(row, channel, cut)
else:
evPass = False
break
if evPass:
if cleanAfter: # Don't save yet, still might get cleaned
rowCleaner.bookRow(row, iRow)
else:
self.results.saveRow(row, channel)
else:
print "%s: Done with %s (%d rows)"%(self.sample, channel, iRow+1)
if cleanAfter:
self.ntuples[channel].SetBranchStatus('*', 1)
if cleanAfter:
rowCleaner.finalize()
for channel in self.channels:
for iRow, row in enumerate(self.ntuples[channel]):
if iRow == self.maxEvents:
break
if rowCleaner.isRedundant(row, channel, iRow):
continue
else:
self.passCut(row, channel, "SelectBest")
self.results.saveRow(row, channel)
print "%s: Done with all channels, saving results as %s"%(self.sample, self.outFile)
self.results.save()
self.inFile.close()
self.cutReport()
def passCut(self, row, channel, cut):
'''
Function to run after cut is passed. Here, just updates the cut summary. In
derived classes, may be overwritten to do other things like fill cut flow
histograms.
'''
self.cutsPassed[channel][cut] += 1
def preCut(self, row, channel, cut):
'''
Here, does nothing. In derived classes, may be used to do things like make
control plots.
'''
pass
def getOSSF(self, row, channel, objects=[]):
'''
Will return a list of same flavor, opposite sign leptons ordered by closeness
to nominal Z mass. Will only return as many pairs as are in the row, so length<4
means there are not two Z candidates in the event. Assumes 4 objects which are all
leptons. If objects list is given, uses that. Otherwise figures it out from channel.
Takes advantage of the fact that FSA ntuples place best Z candidate first in
eeee and mmmm cases.
'''
if not objects:
objects = mapObjects(channel)
if len(objects) != 4:
return []
ossfs = []
# only include pairs that are OSSF
if objects[0][0] == objects[1][0] and not nObjVar(row, 'SS', objects[0], objects[1]):
ossfs.extend(objects[:2])
if objects[2][0] == objects[3][0] and not nObjVar(row, 'SS', objects[2], objects[3]):
ossfs.extend(objects[2:])
# If there's 0 or 1 Z candidate, we don't need to worry about order
if len(ossfs) < 4:
return ossfs
# if this is 2e2mu, we might need to flip if the 2mu Z was better
if channel == 'eemm':
mass1 = nObjVar(row, self.zMassVar, ossfs[0], ossfs[1])
mass2 = nObjVar(row, self.zMassVar, ossfs[2], ossfs[3])
if abs(mass2 - Z_MASS) < abs(mass1 - Z_MASS):
return ossfs[2:]+ossfs[:2]
return ossfs
def cutReport(self):
'''
Save a text file with cut information.
Same name as outfile but .txt instead of .root.
'''
totals = {}
# expectedTotals = {}
# factor to translate n events in MC to m events in data
for cut in self.cutOrder:
totals[cut] = 0
# expectedTotals[cut] = 0.
with open(self.outFile.replace('.root','.txt'), 'w') as f:
for channel in self.channels:
for cleanerCut in ["TotalRows", "SelectBest"]:
if cleanerCut in self.cutsPassed[channel] and cleanerCut not in totals:
totals[cleanerCut] = 0
# expectedTotals[cleanerCut] = 0
break
# if self.cutsPassed[channel]['Total'] != self.maxEvents:
# expectedFactor = sampleInfo[self.sample]['xsec'] * self.intLumi / sampleInfo[self.sample]['n']
# else:
# # estimate fraction that would have passed to be nPassedTot/nEvents ~ nPassed * nRowsTot / (nRows * nEvents)
# # must make this approximation because we don't know what fraction of the sample was cut out
# # by the ntuplizer
# expectedFactor = sampleInfo[self.sample]['xsec'] * self.intLumi * \
# self.ntupleSize[channel] / \
# (self.cutsPassed[channel]['TotalRows'] * sampleInfo[self.sample]['n'])
f.write("\n%-32s\n"%channel) # in %0.0f pb^-1\n"%(channel+':',self.intLumi))
if "TotalRows" in self.cutsPassed[channel]:
listOfCuts = ['TotalRows']+self.cutOrder
elif "SelectBest" in self.cutsPassed[channel]:
listOfCuts = self.cutOrder+["SelectBest"]
else:
listOfCuts = self.cutOrder
for cut in listOfCuts:
# expected = self.cutsPassed[channel][cut] * expectedFactor
f.write("%16s : %-9d\n"%(cut, self.cutsPassed[channel][cut]))
# : %0.2f\n"%(cut, self.cutsPassed[channel][cut], expected))
totals[cut] += self.cutsPassed[channel][cut]
# expectedTotals[cut] += expected
if "TotalRows" in self.cutsPassed[channel]:
listOfCuts = ['TotalRows']+self.cutOrder
elif "SelectBest" in self.cutsPassed[channel]:
listOfCuts = self.cutOrder+["SelectBest"]
else:
listOfCuts = self.cutOrder
f.write("Total\n")
# f.write("\n%-32s in %0.0f pb^-1\n"%('Total:',self.intLumi))
for cut in listOfCuts:
f.write("%16s : %-9d\n"%(cut, totals[cut])) # : %0.2f\n"%(cut, totals[cut], expectedTotals[cut]))