PyHEP 2025 - "Python in HEP" Users Workshop (hybrid), CERN

Session

Plenary Session Monday (2)

27 Oct 2025, 16:30

222/R-001 (CERN)

Conveners

Plenary Session Monday (2)

• Matthew Feickert (University of Wisconsin Madison (US))

12. Reproducible reuse by default: Use of Pixi for software in (Py)HEP

Matthew Feickert (University of Wisconsin Madison (US))

27/10/2025, 16:30

"Long talk"

While advancements in software development practices across particle physics and adoption of Linux container technology have made substantial impact in the ease of replicability and reuse of analysis software stacks, the underlying software environments are still primarily bespoke builds that lack a full manifest to ensure reproducibility across time. Pixi is a new...

29. Histogram Serialization

Henry Fredrick Schreiner (Princeton University)

27/10/2025, 17:20

"Standard talk"

This talk covers histogram serialization that has been added to the latest versions of boost-histogram, hist, and uhi. We'll see how you can serialize and deserialize histograms to multiple formats. We'll also look as related recent advancements, such as the new cross-library tests provided in uhi.

We'll take a deeper look at the new serialization specification that was developed in UHI,...

27. PyTrees for vectors

Nick Smith (Fermi National Accelerator Lab. (US))

27/10/2025, 17:50

Lightning talk

PyTrees are a powerful mechanism for working with nested data structures, while allowing algorithms like finite-differences, minimization, and integration routines to run on flattened 1D arrays of the the same data. The Scikit-HEP vector package recently added pytree support through optree. In this lightning talk, we'll introduce pytrees, show an example of usage, and discuss opportunities for...