3.7.0rc1

First version with lazy profiles:

a = uproot.lazyarrays("nanoaod*.root", "Events", profile="cms.nanoaod")
a.electrons              # jagged array of electron objects
a.electrons.pt           # jagged array of electron pT
a.electrons.photon       # jagged, masked array of the photons linked to each electron (if any)
a.electrons.photon.pt    # their pT
a.photons.pt             # this is different

The profile restructures the lazy array so that—without triggering any reads—it has a physics-friendly nested structure.