Awkward Array is a library for nested, variable-sized data, including arbitrary-length lists, records, mixed types, and missing data, using NumPy-like idioms.

Arrays are dynamically typed, but operations on them are compiled and fast. Their behavior coincides with NumPy when array dimensions are regular and generalizes when they’re not.

Team

• Jim Pivarski
• Ianna Osborne
• Ioana Ifrim
• Henry Schreiner
• Angus Hollands
• Anish Biswas
• Pratyush Das
• Santam Roy Choudhury
• Nick Smith
• Manasvi Goyal

Publications

• How the Scientific Python ecosystem helps answer fundamental questions of the Universe, Matthew Feickert, Nikolai Hartmann, Lukas Heinrich, Alexander Held, Vangelis Kourlitis, Nils Krumnack, Giordon Stark, Matthias Vigl, Gordon Watts, SciPy 2024 (10 Jul 2024).
• Bridging Worlds: Achieving Language Interoperability between Julia and Python in Scientific Computing, I. Osborne, J. Pivarski and J. Ling, arXiv 2404.18170 (Submitted to ACAT 2024) (28 Apr 2024).
• Awkward Just-In-Time (JIT) Compilation: A Developer's Experience, Ianna Osborne, Jim Pivarski, Ioana Ifrim, Angus Hollands and Henry Schreiner, arXiv:2310.01461 [cs.PL] (Submitted to CHEP 2023) (03 Oct 2023).
• Using a DSL to read ROOT TTrees faster in Uproot, A. Roy and J. Pivarski, arXiv 2303.02202 (Submitted to ACAT 2022) (03 Mar 2023).
• The Awkward World of Python and C++, M. Goyal, I. Osborne and J. Pivarski, arXiv 2303.02205 (Submitted to ACAT 2022) (03 Mar 2023) [1 citation].
• Awkward to RDataFrame and back, I. Osborne and J. Pivarski, arXiv 2302.09860 (Submitted to ACAT 2022) (20 Feb 2023) [3 citations].
• An array-oriented Python interface for FastJet, A. Roy, J. Pivarski and C. Freer, J.Phys.Conf.Ser. 2438 012011 (2023) (08 Feb 2022) [1 citation] [NSF PAR].
• AwkwardForth: accelerating Uproot with an internal DSL, J. Pivarski, I. Osborne, P. Das, D. Lange and P. Elmer, EPJ Web Conf. 251 03002 (2021) (24 Feb 2021) [1 citation] [NSF PAR].
• Awkward Array: JSON-like data, NumPy-like idioms, Jim Pivarski, Ianna Osborne, Pratyush Das, Anish Biswas, Peter Elmer, SciPy 2020 (07 Jul 2020).
• Nested data structures in array frameworks, J. Pivarski, D. Lange and P. Elmer, J.Phys.Conf.Ser. 1525 012053 (2020) (07 Jul 2020) [1 citation] [NSF PAR].
• Awkward Arrays in Python, C++, and Numba, J. Pivarski, P. Elmer and D. Lange, EPJ Web Conf. 245 05023 (2020) (15 Jan 2020) [20 citations].
• Columnar data processing for HEP analysis, J. Pivarsk, J. Nandi, D. Lange and P. Elmer, EPJ Web Conf. 214 06026 (2019) (17 Sep 2019) [4 citations].