ATLAS Offline Software
Control
AthenaExamples
AthExHistNtup
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read_hist_ntuple.py
Go to the documentation of this file.
1
import
ROOT
2
print
":"
* 80
3
print
"::: ntuple..."
4
f1 = ROOT.TFile.Open(
"ntuple.root"
,
"READ"
)
5
t = f1.Get(
"trees/tree1"
)
6
print
":: entries:"
,t.GetEntries()
7
print
":: branches:"
,[b.GetName()
for
b
in
t.GetListOfBranches()]
8
for
i
in
xrange
(t.GetEntries()):
9
if
t.GetEntry(i) <= 0:
10
print
"** error reading entry [%i]"
% (i,)
11
break
12
print
":: entry [%i]..."
% (i,)
13
print
":: run:"
,t.run
14
print
":: size:"
,t.size
15
print
":: rundata:"
,
list
(t.rundata)
16
print
":: done."
17
18
print
":"
* 80
19
print
"::: histogram..."
20
f2 = ROOT.TFile.Open(
"hist.root"
,
"READ"
)
21
h1 = f2.Get(
"simple1D/h1"
)
22
print
":: entries:"
,h1.GetEntries()
23
h1.Draw()
24
print
":: done."
25
26
print
"::: bye."
27
xrange
void xrange(TH1 *h, bool symmetric)
Definition:
computils.cxx:516
histSizes.list
def list(name, path='/')
Definition:
histSizes.py:38
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