Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ Upstream-Name: Polars Source: https://github.com/pola-rs/polars Files: * Copyright: 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES. License: Expat Files: crates/polars-arrow/* crates/polars-parquet/* crates/polars-compute/src/gather/binary.rs crates/polars-compute/src/gather/fixed_size_list.rs crates/polars-compute/src/gather/list.rs crates/polars-compute/src/gather/mod.rs crates/polars-compute/src/gather/structure.rs Copyright: 2020-2022 Jorge C. Leitão The Apache Software Foundation and its contributors 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Apache-2.0 and Expat Comment: The polars-arrow and polars-parquet crates contain code taken from arrow2 and parquet2 in October 2023, under Apache-2.0. The handwritten Thrift code in polars-parquet was ported from apache/arrow-rs 57.0 in April 2026; encryption code was ported from arrow-rs 60.0 in September 2026. The gather files listed above also carry Apache-2.0 notices. Later Polars changes are covered by the Expat license in the top-level LICENSE file. These are licenses for different portions of the code, rather than a choice of licenses for the same code. Files: crates/polars-parquet/src/parquet/snappy.rs Copyright: 2011 The Snappy-Rust Authors 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: BSD-3-clause and Expat Comment: Contains the snap 1.1.2 decompressor, adapted to write into uninitialized memory. Its BSD-3-clause notice is embedded in this file; later Polars changes are under Expat. Files: crates/polars-compute/src/hyperloglogplus.rs Copyright: The Apache Software Foundation and its contributors 2014 Salvatore Sanfilippo 2017-2018 The pdatastructures Developers 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Apache-2.0 and BSD-3-clause and Expat Comment: Borrows Apache-2.0 code from DataFusion revision 93771052c5ac31f2cf22b8c25bf938656afe1047. That implementation also derives from Redis revision 4930d19e70c391750479951022e207e19111eb55 (BSD-3-clause), and borrows structure from pdatastructs.rs revision 3997ed50f6b6871c9e53c4c5e0f48f431405fc63 (Expat option selected). The corresponding upstream notices are at: https://github.com/apache/datafusion/blob/93771052c5ac31f2cf22b8c25bf938656afe1047/datafusion/physical-expr/src/aggregate/hyperloglog.rs https://github.com/redis/redis/blob/4930d19e70c391750479951022e207e19111eb55/src/hyperloglog.c https://github.com/crepererum-oss/pdatastructs.rs/blob/3997ed50f6b6871c9e53c4c5e0f48f431405fc63/LICENSE-MIT Files: crates/polars-parquet/src/parquet/handwritten_thrift/parquet_macros.rs Copyright: The Apache Software Foundation and its contributors Jörn Horstmann 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Apache-2.0 and Expat Comment: The Arrow Thrift macros additionally credit Jörn Horstmann's compact-thrift macros. The original runtime declares Apache-2.0 in https://github.com/jhorstmann/compact-thrift/blob/main/runtime/Cargo.toml. Files: crates/polars-parquet/src/parquet/encoding/bitpacked/pack.rs Copyright: 2016 Paul Masurel 2020-2022 Jorge C. Leitão 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Apache-2.0 and Expat Comment: The packing implementation is adapted from bitpacking. See https://github.com/quickwit-oss/bitpacking/blob/master/LICENSE. Expat covers bitpacking and later Polars changes; Apache-2.0 covers parquet2-derived portions under the enclosing crate's licence notice. Files: crates/polars-ops/src/series/ops/business.rs Copyright: 2011 Enthought, Inc. Mark Wiebe 2005-2024 NumPy Developers 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: BSD-3-clause and Expat Comment: The business-day count and offset implementations are ported from NumPy's datetime_busday.c at revision e59c074842e3f73483afa5ddef031e856b9fd313. That file credits Enthought; NumPy's accompanying LICENSE.txt supplies the BSD-3-clause terms. See https://github.com/numpy/numpy/blob/e59c074842e3f73483afa5ddef031e856b9fd313/numpy/_core/src/multiarray/datetime_busday.c. Files: crates/polars-async/src/executor/mod.rs crates/polars-async/src/executor/task.rs crates/polars-ops/src/chunked_array/strings/case.rs crates/polars-ops/src/chunked_array/strings/unicode_internals/mod.rs crates/polars-row/src/fixed/numeric.rs crates/polars-utils/src/chunked_bytes_cursor.rs crates/polars-utils/src/range.rs Copyright: The Rust Project Developers and contributors 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: Contain code copied or adapted from the Rust standard library. The Expat option is selected for the Rust code. Rust's copyright policy and dual-licence grant are recorded in https://github.com/rust-lang/rust/blob/1.70.0/COPYRIGHT. The generated Unicode property tables are recorded separately below. Files: crates/polars-ops/src/chunked_array/strings/unicode_internals/unicode_data.rs Copyright: The Rust Project Developers and contributors 1991-2022 Unicode, Inc. 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat and Unicode-DFS-2016 Comment: Contains Rust Unicode lookup helpers and the Case_Ignorable and Cased property tables for Unicode 15.0.0. Both property modules match Rust 1.70.0's unicode_data.rs byte for byte; the lookup helper differences are formatting. The Expat option covers the Rust code and Polars changes; the Unicode data licence reproduced below covers the derived data. See https://github.com/rust-lang/rust/blob/1.70.0/library/core/src/unicode/unicode_data.rs and the Unicode notice in that release's COPYRIGHT file. Files: crates/polars-core/src/chunked_array/from_iterator_par.rs Copyright: 2010 The Rust Project Developers 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: Contains iterator collection code copied or adapted from Rayon. The Expat option is selected; its notice is in https://github.com/rayon-rs/rayon/blob/v1.3.1/LICENSE-MIT. Files: crates/polars-core/src/hashing/vector_hasher.rs Copyright: 2018 Tom Kaitchuck 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: Contains code inlined from aHash. The Expat option is selected. See https://github.com/tkaitchuck/aHash/blob/f9acd508bd89e7c5b2877a9510098100f9018d64/LICENSE-MIT. Files: crates/polars-utils/src/hashing.rs Copyright: 2005-2014 Daniel James 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: BSL-1.0 and Expat Comment: The _boost_hash_combine helper is adapted from Boost's hash_combine. The corresponding Boost notice is in https://github.com/boostorg/container_hash/blob/boost-1.78.0/include/boost/container_hash/hash.hpp. Files: crates/polars-json/src/json/write/utf8.rs Copyright: Erick Tryzelaar David Tolnay 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: Adapted from serde_json revision f901012df66811354cb1d490ad59480d8fdf77b5. The Expat option is selected; the original Cargo.toml names the authors and the licence choice. See https://github.com/serde-rs/json/blob/f901012df66811354cb1d490ad59480d8fdf77b5/Cargo.toml. Files: crates/polars-compute/src/rolling/no_nulls/quantile.rs Copyright: 2012-2016 Dahua Lin, Simon Byrne, Andreas Noack, Douglas Bates, John Myles White, Simon Kornblith, and other contributors 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: The weighted quantile implementation credits Julia's StatsBase.jl. Its MIT notice names the contributors listed above; see https://github.com/JuliaStats/StatsBase.jl/blob/v0.33.21/LICENSE.md. Files: crates/polars-time/src/windows/* crates/polars-defs/src/time/duration.rs Copyright: 2013-2018 InfluxData Inc. 2020 InfluxData 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: The windowing code credits ports from InfluxDB IOx and Flux; their duration representation is now in polars-defs. Flux's original notices are at the revisions cited by windows/mod.rs: https://github.com/influxdata/flux/blob/3d6c47d9113fe0d919ddd3d4eef242dfc38ab2fb/LICENSE https://github.com/influxdata/flux/blob/1e9bfd49f21c0e679b42acf6fc515ce05c6dec2b/LICENSE The former IOx repository is no longer available at its original URL; its historical source and MIT notice are preserved in https://github.com/metrico/influxdb_iox/blob/main/query_functions/src/window/internal.rs and https://github.com/metrico/influxdb_iox/blob/main/LICENSE-MIT. The MIT option is selected for IOx's MIT OR Apache-2.0 grant. Files: crates/polars-io/src/cloud/credential_provider.rs Copyright: 2020-2024 The Apache Software Foundation 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Apache-2.0 and Expat Comment: The split_sas helper is copied and adjusted from object_store's Azure builder at revision 7a0504b4924fcecee17d768fd7190b8f71b0877f. The source header grants Apache-2.0; the accompanying NOTICE.txt supplies the copyright notice. This applies even when cloud support is disabled. See https://github.com/apache/arrow-rs-object-store/blob/7a0504b4924fcecee17d768fd7190b8f71b0877f/src/azure/builder.rs. Files: py-polars/src/polars/_cpu_check.py Copyright: 2014 Anders Høst 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: Contains code vendored from https://github.com/flababah/cpuid.py. Files: crates/polars-utils/src/levenshtein.rs Copyright: 2016 Titus Wormer 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES License: Expat Comment: Based on https://github.com/wooorm/levenshtein-rs/blob/9c4730b1973d4e61e187f8fe6d5f299ad5c991fc/src/lib.rs. Files: py-polars/src/polars/_utils/nest_asyncio.py Copyright: 2025 Ritchie Vink 2018-2020 Ewald de Wit. All rights reserved. License: BSD-2-clause Comment: Vendored from https://github.com/Chaoses-Ib/nest-asyncio2. Files: docs/source/_build/css/extra.css Copyright: 2025 Ritchie Vink 2024 (Some portions) NVIDIA CORPORATION & AFFILIATES. All rights reserved. 2023 Fonticons, Inc. License: Expat and CC-BY-4.0 Comment: The CSS contains an embedded Rust SVG icon from Font Awesome Free 6.4.0. The icon is licensed under CC-BY-4.0; the surrounding Polars CSS is licensed under Expat. The icon's attribution is retained in the embedded SVG comment. See https://github.com/FortAwesome/Font-Awesome/blob/6.4.0/LICENSE.txt. 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