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I am trying to do some BDT studies. The old framework used uproot3. There is a line like:
all_ttrees = dict(file.allitems(filterclass=lambda cls: issubclass(cls, uproot3.tree.TTreeMethods)))
How can I replace it in uproot4? Actually, I have checked the tutorial of uproot4, but I did not understand it well.
Thank you very much!