3.7.0

Full release with lazy profiles (see pre-release announcement).

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.

3.6.5

Can now write LZ4-compressed data (PR #288).

3.6.4

Updated front-page documentation. New version to copy it to PyPI.

3.6.3

Added

• Writing TH1, TH2, TH3, TProfile, and TProfile2D.
• Memory size units as strings, like "1 GB", particularly in entrysteps (e.g. for data in tree.iterate(entrysteps="1 GB")). (Issue #285)
• tree.mempartitions implements memory-sized partitions, like clusters but targeting a memory size.
• Memory size units can be used in all arguments that specify a number of bytes, such as limitbytes, chunkbytes in ArrayCache and uproot.open for remote files.
• HTTP and XRootD source options can now be passed simply into uproot.open("http://remote/file.root", limitbytes="1 GB").
• Fixed error in entrysteps (Issue #286).
• Fixed some documentation.
• Fixed branch selection with a boolean function.

3.6.2

XRootDSource.defaults['parallel'] = False because pyxrootd asynchronous mode deadlocks too easily.

3.6.1

PR #280 (fixes for LPC HATS), specifically better handling of lazy arrays, as well as a bug in reading from writable files (chunked file source missing an argument).

3.6.0

Replaced the custom LazyArray class with awkward.ChunkedArrays of awkward.VirtualArrays.

Updated the minimum versions: awkward 0.10.0+ and uproot-methods 0.6.0+.

3.5.2

Fixes #274, a bug when reading asgenobj branches through uproot.iterate.

3.5.1

PR #269: adds the ability to write 2 and 3 dimensional histograms to ROOT files.

PR #270: makes XRootDSource safe to use in multiprocessing.