Tools for doing Collider HEP style analysis with columnar operations
coffea is a prototype package for pulling together all the typical needs of a high-energy collider physics (HEP) experiment analysis using the scientific python ecosystem. It makes use of uproot and awkward-array to provide an array-based syntax for manipulating HEP event data in an efficient and numpythonic way. There are sub-packages that implement histogramming, plotting, and look-up table functionalities that are needed to convey scientific insight, apply transformations to data, and correct for discrepancies in Monte Carlo simulations compared to data.
coffea also supplies facilities for horizontally scaling an analysis in order to reduce time-to-insight in a way that is largely independent of the resource the analysis is being executed on. By making use of modern big-data technologies like Apache Spark, parsl, Dask , and Work Queue, it is possible with coffea to scale a HEP analysis from a testing on a laptop to: a large multi-core server, computing clusters, and super-computers without the need to alter or otherwise adapt the analysis code itself.
coffea is a HEP community project collaborating with iris-hep and is currently a prototype. We welcome input to improve its quality as we progress towards a sensible refactorization into the scientific python ecosystem and a first release. Please feel free to contribute at our github repo!
Install coffea like any other Python package:
pip install coffea
or similar (use sudo, --user, virtualenv, or pip-in-conda if you wish). For more details, see the Installing coffea section of the documentation.
- Python (3.6+)
The following are installed automatically when you install coffea with pip:
- numpy (1.15+);
- uproot for interacting with ROOT files;
- uproot-methods to interpret columnar representations of ROOT objects transparently;
- awkward-array to manipulate complex-structured columnar data, such as jagged arrays;
- numba just-in-time compilation of python functions;
- scipy for many statistical functions;
- matplotlib as a plotting backend;
- and other utility packages, as enumerated in setup.py.
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