diff --git a/Phys/B2KShh/job/look_in_file.py b/Phys/B2KShh/job/look_in_file.py
new file mode 100644
index 0000000..25a91b4
--- /dev/null
+++ b/Phys/B2KShh/job/look_in_file.py
@@ -0,0 +1,58 @@
+import sys
+import ROOT as r
+
+def getall(d, basepath="/"):
+    "Generator function to recurse into a ROOT file/dir and yield (path, obj) pairs"
+    keylist = d.GetListOfKeys()
+    for key in keylist:
+        kname = key.GetName()
+        if key.IsFolder() and d.Get(kname).ClassName() == 'TDirectoryFile' :
+            for i in getall(d.Get(kname), basepath+kname+"/"):
+                yield i
+        else:
+            yield basepath+kname, d.Get(kname)
+
+def getLeaves(t):
+    keylist = t.GetListOfLeaves()
+    for key in keylist:
+        #print key
+        yield t.GetName() + '/' + key.GetName(), key
+
+def getAllLeaves(f):
+    for k, o in getall(f):
+        #print o.ClassName(), k
+        yield k, o
+        if 'TTree' in o.ClassName():
+            for l, lo in getLeaves(o):
+                #print lo.ClassName(), l
+                yield k+'/'+l, lo
+
+
+fname = str(sys.argv[1])
+basepath = '/disk/users/elena/B2KShh/ntuples/jobs/'
+
+f = r.TFile(basepath + fname, 'read')
+
+# dirs = []
+# print '%s :' % fname
+# for k in f.GetListOfKeys():
+#   print '\t %s :' % k.GetName()
+#   dirs.append(k.GetName())
+#   f.cd(k.GetName())
+# f.cd()
+#   for item in r.gDirectory.GetList():
+#       print '\t\t %s' % item.GetName()
+
+#for k, o in getall(f):
+#    print o.ClassName(), k
+
+leaves = []
+for k, o in getAllLeaves(f):
+    print o.ClassName(), k
+    leaves.append((k, o))
+
+polarity = [l for l in leaves if 'polarity'.lower() in l[0].lower()]
+polarity += [l for l in leaves if 'pol'.lower() in l[0].lower()]
+polarity += [l for l in leaves if 'magnet'.lower() in l[0].lower()]
+polarity += [l for l in leaves if 'mag'.lower() in l[0].lower()]
+#polarity += [l for l in leaves if 'h1'.lower() in l[0].lower()]