feat: adopt coffea 2023

[alexander-held]

very much a work in progress right now

• do not use self.hist.copy(), create new histogram instead
• reproducers of issues at https://gist.github.com/alexander-held/1c91a599096465528fc5d7cee71b0174

useful insert for debugging

use https://github.com/scikit-hep/scikit-hep-testdata/raw/main/src/skhep_testdata/data/nanoAOD_2015_CMS_Open_Data_ttbar.root as input file for quicker debugging

    import os
    import urllib.request

    ttbar_file = "https://xrootd-local.unl.edu:1094//store/user/AGC/nanoAOD/TT_TuneCUETP8M1_13TeV-powheg-pythia8/cmsopendata2015_ttbar_19980_PU25nsData2015v1_76X_mcRun2_asymptotic_v12_ext3-v1_00000_0000.root"

    # download for subsequent use
    local_file_name = "ttbar.root"
    if not os.path.exists(local_file_name):
        urllib.request.urlretrieve(ttbar_file, filename=local_file_name)

    NanoAODSchema.warn_missing_crossrefs = False # silences warnings about branches we will not use here
    from coffea.nanoevents import NanoEventsFactory

    metadata = {'process': 'ttbar', 'variation': 'nominal', 'nevts': 1334428, 'xsec': 729.84, 'dataset': 'ttbar__nominal'}
    events = NanoEventsFactory.from_root("ttbar.root", schemaclass=NanoAODSchema, treepath="Events", metadata=metadata, permit_dask=True).events()
    output = TtbarAnalysis(DISABLE_PROCESSING, IO_FILE_PERCENT).process(events)
    breakpoint()
    print(output["hist"].dask)
    print(dak.necessary_columns(output["hist"]))
    print(output["hist"].compute())
    breakpoint()

[alexander-held]

closing this: superseded by the work in #164