PythonAnalysis/examples/MCTruth2.py

from cmstools import *
from ROOT import *

# prepare the FWLite autoloading mechanism
gSystem.Load("libFWCoreFWLite.so")
AutoLibraryLoader.enable()

# load the file with the generator output
theFile = TFile("generatorOutput.root")

# access the event tree
events = EventTree(theFile.Get("Events"))

# access the products inside the tree
# aliases can be used directly
sourceBranch = events.branch("source")

# loop over the events
for event in events:
    genEvent = sourceBranch().GetEvent()
    print genEvent
Revision:	1.1
Committed:	Wed Nov 1 10:47:55 2006 UTC (18 years, 6 months ago) by hegner
Content type:	text/x-python
Branch:	MAIN
CVS Tags:	V00-01-03, V00-01-02
Log Message:	moved examples to example directory/ added interactive example
#	User	Rev	Content
1	hegner	1.1	from cmstools import *
2			from ROOT import *
3
4			# prepare the FWLite autoloading mechanism
5			gSystem.Load("libFWCoreFWLite.so")
6			AutoLibraryLoader.enable()
7
8			# load the file with the generator output
9			theFile = TFile("generatorOutput.root")
10
11			# access the event tree
12			events = EventTree(theFile.Get("Events"))
13
14			# access the products inside the tree
15			# aliases can be used directly
16			sourceBranch = events.branch("source")
17
18			# loop over the events
19			for event in events:
20			genEvent = sourceBranch().GetEvent()
21			print genEvent