uproot-custom demo for PyHEP 2025

This project is a demonstration of how to use the uproot-custom package to customize TTree reading in Uproot.

Prerequisites

To run this demo, you need to have:

• Python >= 3.9, < 3.14
• C++ compiler supporting C++17
• CMake >= 3.20

If you want to generate the demo data file, you will need to have ROOT installed.

Create virtual environment

python -m venv .venv
source .venv/bin/activate

Install demo project

pip install -e .

This will compile the C++ codes and install the my_reader package in editable mode. Then you can run the demo script/notebook.