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I want to add some cut when cloning a tree in pyroot:
tree = rfile.Get(treeName)
newtree = tree.CloneTree()
Here you can see that, I got a tree. Then I want to add some cuts to slim it, like “Pt > 50”, then clone a slimmed tree.
Is there a simple way to do this?
Thank you very much for your time!
I would use RDataFrame:
Basically you would need to do
df = ROOT.RDataFrame("tree_name", "file_name.root")
df.Filter("Pt > 50").Snapshot("tree_name", "new_file.root")
After that you can open the new file and get the tree (and clone it if you want).
Thanks a lot! Yes, it is a good idea!
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