PyPI · #816 most downloaded on PyPI

lightgbm

4.7.019M downloads/molightgbm-org/LightGBM ↗New releases in your daily digest, changelog included.

LightGBM Python-package

Last release 2 months ago
18 Jul 2026
Release timing varies
gaps range from 3 weeks to 1.4 years
Some releases are documented
notes for 22 of 37 stable releases
Nothing withdrawn
no release was ever pulled
9 years old
38 releases · first in 2017

Release timeline

38 releases since 2017

2017201920212023

Releases

4.7.018 Jul 2026Deprecated
[python-package] scikit-learn fit() methods: add eval_X, eval_y, deprecate eval_set @lorentzenchr
Highlights

The Python package now supports polars inputs, thanks to narwhals.
Thanks to @borchero for the main implementation and to everyone who contributed design work, especially on #6204 (@maxzw @detrin @jmoralez @lcrmorin @Ic3fr0g @MarcoGorelli @kylebarron @vyasr).

Significantly improved GPU support including the first ROCm builds (#6086) and multi-GPU support for NVIDIA GPUs via NCCL (#6138). (@jeffdaily @shiyu1994 @StrikerRUS)

Improvements to distributed training / Dask. Lots of bugfixes in this area, still ongoing work, thanks especially to @wagner-austin for all the help.

Some organizational changes. The project has changed GitHub orgs (Microsoft -> lightgbm-org) and default branch names (master -> main).

Changes

💡 New Features

[python-package] allow access to eval result attributes by name @jameslamb (#7161)

[python-package] Allow to pass Arrow array & Polars series as position @maxzw (#7260)

[c++][python-package] Leverage Arrow PyCapsule Interface for Arrow interoperability (including polars support) @borchero (#7275)

[python-package] publish nightlies to pypi.anaconda.org @jameslamb (#7245)

[python-package] Add decision_function() to LGBMClassifier @CoderWota (#7159)

[CUDA] Multi-GPU for CUDA Version @shiyu1994 (#6138)

[python-package] scikit-learn fit() methods: add eval_X, eval_y, deprecate eval_set @lorentzenchr (#6857)

[CUDA] Add CUDA version of binary error metric @nicklamiller (#7070)

[c++] Add CPU version of standard R-squared metric @nicklamiller (#7008)

[python-package] Follow symlinks to lib_lightgbm in library-loading @gmhewett (#6977)

[ROCm] add support for ROCm/HIP device @jeffdaily (#6086)

[python-package][sklearn] Support PyArrow Table as an input in scikit-learn methods @StrikerRUS (#6910)

[ci] [dask] test lightgbm.dask on macOS @jameslamb (#6677)

🔨 Breaking

[ci] avoid overwriting installed 'build' in build-python.sh @jameslamb (#7356)

change default branch from 'master' to 'main' @jameslamb (#7287)

[CUDA] support CUDA 13, support user-supplied CUDA architecture list, update default GPU architectures @jameslamb (#7271)

[python-package] make some imports lazy: 'dask', 'graphviz', 'joblib', 'matplotlib', 'psutil' @jameslamb (#7340)

[python-package] Make Dataset.set_position() update self.position @maxzw (#7344)

[c++][python-package] Leverage Arrow PyCapsule Interface for Arrow interoperability (including polars support) @borchero (#7275)

[c++] Remove incorrect const modifier from Arrow-related C API @borchero (#7284)

[python-package] Bump minimum supported Python version to 3.10 @borchero (#7276)

[ci] [docs] update handling of artifacts, stop publishing zip archive of complete source code @jameslamb (#7080)

[c++] default to C++17 for most builds @jameslamb (#7016)

[ci] [C++] drop support for Visual Studio 2015 (fixes #6803) @jameslamb (#7022)

[R-package] [ci] drop support for R 3.x (fixes #7023) @jameslamb (#7038)

[CUDA] default to C++17 for CUDA builds @jameslamb (#7013)

[ci] Drop support for Python 3.7 and Python 3.8 @borchero (#6896)

[python-package] drop support for h2o datatable @jameslamb (#6894)

[python-package] Load parameters from model string @Samsagax (#6852)

[R-package] make finalize() in R6 classes private @jameslamb (#6833)

🚀 Efficiency Improvement

[CUDA] Multi-GPU for CUDA Version @shiyu1994 (#6138)

🐛 Bug Fixes

[c++] fail on incomplete binary file writes @wgu9 (#7348)

Fix calculation of percentiles for weighted training with regression objectives (including mape, quantile, and regression_l1) @JKDasondee (#7224)

[python-package] fix misleading feature name warning on sklearn 1.6+ predict() @FranciscoRMendes (#7232)

[python-package] Enable ruff rule B905 @borchero (#7278)

[cuda] Fix dense histogram offset issue for global-memory @maxwbuckley (#7261)

[python-package] fix misleading redundant parameter warnings in Booster.refit() @arjunprakash027 (#7124)

[c++] fix multithreading pragma in LeafSplits::Init() @jameslamb (#7200)

[ROCm] fix build, add rccl support @jeffdaily (#7185)

[ROCm] add ROCm support (pt. 2) @jeffdaily (#7039)

[python-package] plot_importance(): raise clearer exception when model has 0 splits @juanf-0gravity (#7160)

[python-package] [dask] [ci] fix predict() type hints, enforce mypy in CI @jameslamb (#7140)

[c++] fix socket timeout on POSIX systems @wagner-austin (#7137)

[C-API] Avoid C++ includes from arrow.h when including c_api.h @desertstsung (#6973)

[python-package] add PyArrow Table to get_data @suk1yak1 (#6911)

[python-package] Fix mypy checks in compat.py @borchero (#6898)

[swig] fix memory leak in swig interface @s-rwe (#6923)

[R-package] Ensure print.lgb.Booster() works when objective is not explicitly set @walkerjameschris (#6850)

prohibit use of regression_l1 objective with linear trees @jameslamb (#6859)

📖 Documentation

[docs] [python-package] Update pandas categorical feature encoding details @maxzw (#7250)

[docs] add 'darts' and 'nvForest' to list of external repositories @jameslamb (#7272)

[docs] add LightGBM-MoE to external repositories list @kyo219 (#7247)

[docs] add Michael Mayer to CODEOWNERS and docs @jameslamb (#7239)

[docs] Added an icon for the Winget package for when the relevant PR gets merged in Winget-pkgs. @DandelionSprout (#7110)

[docs] Add weight to LeafSplits->Init() docs @roychan (#7079)

[docs] update badges in README @StrikerRUS (#7057)

[docs] Update list of winning solutions @JAroyan (#7042)

[docs] add Ray Train API @sotagg (#7020)

[docs] add StackOverflow badge in README @StrikerRUS (#7026)

[docs] [python-package] document how to run Python tests @jameslamb (#6995)

[docs] Fix docs of Booster.update's return value is_finished @mlondschien (#6890)

[docs] add GBNet to External Repositories list @jameslamb (#6965)

[docs] fix link to "Parallel Algorithm for Decision Tree" paper @PriyadarshiAkshay (#6933)

[docs] document use of EffVer @jameslamb (#6905)

[docs][python] update types in docstring @StrikerRUS (#6897)

[docs] update Python-package installation guide @StrikerRUS (#6767)

[docs] add a note about DART in early_stopping docstring @jameslamb (#6846)

🧰 Maintenance

release v4.7.0 @jameslamb (#7129)

[python-package] Add pandas tests for categorical handling and dtype validation @maxzw (#7359)

[ci] add ppc64le C++ test job @asifsheikhibm (#7345)

[ci] remove lingering references to 'master' branch @jameslamb (#7353)

[ci] [R-package] use a Windows-specific download link for SWIG, stop using '<<-' in R code @jameslamb (#7364)

[python-package] remove unnecessary old import paths in compat.py @jameslamb (#7358)

[ci] Update pre-commit hooks @anjmon (#7351)

[ci]: Bump the ci-dependencies group with 3 updates @dependabot[bot] (#7349)

[python-package] remove unused 'cffi' fixture @jameslamb (#7341)

[python-package] remove dependency on typing_extensions.TypeGuard @jameslamb (#7339)

[ci] use pixi to manage end-of-life Python environments @jameslamb (#7328)

[ci]: Bump the ci-dependencies group with 2 updates @dependabot[bot] (#7329)

[python-package] [dask] remove an unnecessary check on Dask installation @jameslamb (#7332)

[R-package] clean up more autoconf / automake files @jameslamb (#7331)

[python-package] [ci] simplify test-skipping logic @jameslamb (#7297)

[ci] exclude more files from biome config @jameslamb (#7293)

normalize line endings to LF, enforce that with gitattributes @jameslamb (#7291)

[R-package] Skip compilation of Arrow-related C++ code @borchero (#7283)

[ci] [R-package] fix docs build, test pkgdown build in CI @jameslamb (#7268)

[python-package] Add official support for Python 3.14 @borchero (#7279)

[python-package] Bump minimum pyarrow version to v16.0.0 @borchero (#7280)

[python-package] Bump minimum pyarrow dependency version to v14.0.2 @borchero (#7277)

[ci]: Bump the ci-dependencies group with 3 updates @dependabot[bot] (#7252)

[ci] update to r-lib/actions v2.12.0, align 'pip' and 'python' to same interpreter in 'build-python.sh' @jameslamb (#7249)

[ci] cut some macOS jobs @jameslamb (#7223)

[c++] mark a few more read-only methods const @jameslamb (#7228)

[ci] adapt to scikit-learn ClassifierChain changes, fix {fs} install, work around pyarrow type-checking issues @jameslamb (#7236)

[ci] [R-package] drop 'icc' test job, update clang and GCC r-hub container jobs @jameslamb (#7222)

[ci] remove uses of azurecr.io for CI images @jameslamb (#7199)

[ci] enforce 'zizmor' checks in CI @jameslamb (#7218)

[ci]: Bump actions/download-artifact from 8.0.0 to 8.0.1 in the ci-dependencies group @dependabot[bot] (#7216)

[python-package] standardize variable naming for evaluation results @jameslamb (#7163)

[c++] remove unused ArrayArgs::CheckAllZero(), reduce macro scope in socket_wrapper @jameslamb (#7201)

[R-package] deprecate lgb.interprete() @jameslamb (#7148)

[python-package] Add tests on Booster.eval() handling of new validation sets @daguirre11 (#7167)

[cmake] move cmake_minimum_required to first line @jameslamb (#7210)

[ci] restore nightly-scipy testing, update nightly floors @jameslamb (#7213)

[ci] [dask] restore testing against new dask versions, fix {fs} install (again) @jameslamb (#7211)

[ci] install 'CMake' in R-package jobs for {fs} @jameslamb (#7209)

[ci] pin GitHub Actions to commit SHAs @jameslamb (#7192)

[docs] [ci] Update docs and source code for org change @jameslamb (#7188)

[ci]: Bump the ci-dependencies group with 3 updates @dependabot[bot] (#7174)

[python-package] fix test_numeric_split_direction to test all parameter combinations @wagner-austin (#7131)

[python-package] Added test for plot_metric ylim @daguirre11 (
Note truncated.

4.6.015 Feb 2025Deprecated

[python-package] deprecate support for H2O 'datatable' @jameslamb

Changes

💡 New Features

[CUDA] fix setting of CUDA architectures and enable support for NVIDIA Blackwell @StrikerRUS (#6812)
[python-package] support Python 3.13 @jameslamb (#6668)
[GPU] Add support for linear tree with device=gpu @dragonbra (#6567)
[c++] Add Bagging by Query for Lambdarank @shiyu1994 (#6623)

🔨 Breaking

[R-package] require lgb.Dataset, remove support for passing 'colnames' and 'categorical_feature' for lgb.train() and lgb.cv() @jameslamb (#6714)
[python-package] support sub-classing scikit-learn estimators @jameslamb (#6783)
[python-package] do not copy column-major numpy arrays when creating Dataset from list of arrays @jmoralez (#6773)
[python-package] remove support for passing 'feature_name' and 'categorical_feature' through train() and cv() @jameslamb (#6706)
[python-package] require scikit-learn>=0.24.2, make scikit-learn estimators compatible with scikit-learn>=1.6.0dev @vnherdeiro (#6651)
[ci] Require CMake 3.28 and replace FetchContent_Populate with FetchContent_MakeAvailable @StrikerRUS (#6550)

🚀 Efficiency Improvement

[python-package] do not copy column-major numpy arrays when predicting @jmoralez (#6751)
[python-package] do not copy column-major numpy arrays when creating Dataset @jmoralez (#6721)

🐛 Bug Fixes

[python-package] Separately check whether pyarrow and cffi are installed @mlondschien (#6785)
[c++] Fixed Predictor lifecycle and trees initialization in Contrib mode @AndreyOrb (#6778)
[python-package] Infer feature names from pyarrow.Table @mlondschien (#6781)
[python-package] Fix inconsistency in predict() output shape for 1-tree models @RektPunk (#6753)
[fix] resolve potential attack in linker connection building @shiyu1994 (#6752)
[R-package] Avoid bashisms (non-POSIX code) in R-package/configure @smoser (#6746)
[c++] fix parallel_tree_learner_split_info @moming39 (#6738)
[c++] Fix dump_model() information for root node @neNasko1 (#6569)
[cmake] [R-package] include R-for-macOS vendored libs dir in OpenMP search path (fixes #6628) @jameslamb (#6629)
[R-package] only warn about early stopping and DART boosting being incompatible if early stopping was requested @serkor1 (#6619)
[cmake] fixes static build for macos with OpenMP enabled (fixes #6601) @Mottl (#6600)

📖 Documentation

[docs] update installation guide @StrikerRUS (#6696)
[docs] add note about pyodide support @jameslamb (#6715)
[docs] Remove only cpu note due to gpu support for linear trees @JAroyan (#6686)
[docs] fix inaccurate comment for force_col_wise param with CUDA version @StrikerRUS (#6695)
[docs] group logically external projects in README and add some new libraries @StrikerRUS (#6691)
[docs] use consistent naming for R-package and Python-package across the repo @StrikerRUS (#6655)
[docs] add supertree in README @pplonski (#6625)
[docs] unify language and make small improvements in some param descriptions @StrikerRUS (#6618)
[doc] Updates Rust bindings library link in README.md @Mottl (#6611)
[R-package] [docs] update cran-comments for v4.5.0 release @jameslamb (#6578)
[docs] add conda version badge @StrikerRUS (#6576)

🧰 Maintenance

release v4.6.0 @jameslamb (#6796)
[c++] update to fmt 11.1.2, fast_double_parser 0.8.0 @jameslamb (#6802)
[ci] fix valgrind workflow @jameslamb (#6816)
[ci] validate pyproject file by json schema @StrikerRUS (#6813)
[ci] [python-package] update pre-commit hooks to latest versions @jameslamb (#6817)
[ci]: Bump release-drafter/release-drafter from 6.0.0 to 6.1.0 in the ci-dependencies group @dependabot[bot] (#6810)
[ci] fix errors about line length in yaml files (Part 4) @StrikerRUS (#6804)
[ci] remove pandas before testing that LightGBM can be imported without extra deps @StrikerRUS (#6801)
[ci] fix errors about comments indentation in yaml files (Part 3) @StrikerRUS (#6794)
[ci] fix errors about indentation in yaml files (Part 2) @StrikerRUS (#6789)
[ci] [python-package] build macOS x86_64 wheels on macOS 13 (Ventura) @jameslamb (#6669)
[ci] add yaml files linter to pre-commit hook but skip some rules for now (Part 1) @StrikerRUS (#6763)
[ci] lock inactive issues and PRs at different time @StrikerRUS (#6764)
[ci][python-package] add testing for the shape of raw score predictions @StrikerRUS (#6765)
[ci] pin more dependencies in Python 3.8 environment @jameslamb (#6771)
[CUDA] remove src/treelearner/kernels @shiyu1994 (#6766)
[python-package] stop relying on string concatenation / splitting for cv() eval results @jameslamb (#6761)
[ci] Add Release Drafter workflow @StrikerRUS (#6754)
[python-package] Rename cvfolds variable into cvbooster in engine.cv function @ClaudioSalvatoreArcidiacono (#6762)
[python-package] simplify eval result printing @jameslamb (#6749)
[ci] fix linkchecker job @jameslamb (#6757)
[ci] remove Docker volumes during Azure cleanup @StrikerRUS (#6760)
[ci] use Ruff linter instead of isort @StrikerRUS (#6755)
[ci] set upper bound on dask @jmoralez (#6742)
[c++] include wherever uint8_t is used @jameslamb (#6736)
[python-package] simplify scikit-learn 1.6+ tags support @jameslamb (#6735)
[ci] Introduce typos pre-commit hook @borchero (#6564)
[ci] [python-package] [R-package] adapt to scikit-learn check_sample_weight_equivalence changes, stop testing against R 3.6 on Linux @jameslamb (#6733)
[python-package][R-package] adapt to scikit-learn 1.6 testing changes, pin more packages in R 3.6 CI jobs @jameslamb (#6718)
[ci] [R-package] re-enable 'rchk' checks @jameslamb (#6713)
[ci] check PowerShell scripts with PSScriptAnalyzer (part 3) @StrikerRUS (#6710)
[ci] check JavaScript code with biome tool @StrikerRUS (#6711)
[ci] check PowerShell scripts with PSScriptAnalyzer (part 2) @StrikerRUS (#6709)
[ci] check PowerShell scripts with PSScriptAnalyzer (part 1) @StrikerRUS (#6704)
[ci] [R-package] remove code for 'rchk' checks @jameslamb (#6545)
[ci] Fix version matching between RTD pages and R-package pages @StrikerRUS (#6673)
[python-package] remove MSVS solution files from sdist @jameslamb (#6698)
[ci] set MinimumVisualStudioVersion to MSVS 2015 @StrikerRUS (#6689)
[ci] fix build of LightGBM with MSVS GUI @StrikerRUS (#6690)
[cmake] group sanitizer options together @StrikerRUS (#6688)
[ci] add shellcheck, use latest pre-commit hook versions @jameslamb (#6685)
[ci] fix some shellcheck warnings in package-building scripts @vnherdeiro (#6641)
[python-package] deprecate support for H2O 'datatable' @jameslamb (#6670)
[ci] enable OpenMP support in cpp tests @StrikerRUS (#6676)
[python-package] ignore scikit-learn 'check_sample_weight_equivalence' estimator check (fixes #6678) @jameslamb (#6679)
[ci] fix shellcheck warnings in CI scripts @vnherdeiro (#6646)
[ci] Restore MPI jobs on macOS @StrikerRUS (#6664)
[ci] Update CUDA versions for CI @StrikerRUS (#6539)
[ci] replace uses of 'mamba' with 'conda', use Python 12 for test-python-latest-job @jameslamb (#6663)
[cmake] simplify SWIG config @StrikerRUS (#6648)
[ci] [R-package] re-enable R-devel clang16 job (fixes #6607) @jameslamb (#6642)
[cmake] remove unused variable @StrikerRUS (#6647)
[ci] [python-package] temporarily stop testing against scikit-learn nightlies, load lib_lightgbm earlier @jameslamb (#6654)
[ci] prevent C API tests from leaving files behind (fixes #6361) @jameslamb (#6637)
[python-package] limit when num_boost_round warnings are emitted (fixes #6324) @jameslamb (#6579)
[ci] prevent Python tests from leaving behind files @vnherdeiro (#6626)
fix some shellcheck warnings @vnherdeiro (#6621)
[ci] fix linux runners running out of disk space (fixed #6635) @jameslamb (#6636)
[python-package] remove setup.cfg @jameslamb (#6624)
[cmake] consolidate set_target_properties() calls @jameslamb (#6594)
[ci] prevent train.binary.bin and lgb_train_data.bin files being left behind after testing @bili2002 (#6606)
[ci] update some linting versions @jameslamb (#6598)
[ci] skip R-devel clang16 job and use gcc-12 for macOS Python jobs @jameslamb (#6608)
[python-package] update to scikit-build-core 0.10 @jameslamb (#6597)
[ci] restore nuget artifact creation @StrikerRUS (#6593)
[R-package] [cmake] simplify CMake-based R builds @jameslamb (#6591)
[cmake] stop using file(GLOB) @jameslamb (#6588)
[ci] prevent categorical.model and model.txt files being left behind after testing @neNasko1 (#6590)
[ci] Always use latest SWIG version in Windows CI job @StrikerRUS (#6541)
[ci] place all CI helpers under the .ci folder and use - instead of _ in their names @StrikerRUS (#6581)
[ci] fix MSVC warning about builds in temp directory @StrikerRUS (#6573)
bump development version to 4.5.0.99 @jameslamb (#6575)
[ci] ask pip to always install local artifact but not download package from PyPI @StrikerRUS (#6574)

Open source →

Additional notes

v4.6.0

Compare

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Open source →

4.5.026 Jul 2024Deprecated

[test][python] fix pandas DeprecationWarning about is_sparse function @StrikerRUS

Changes

💡 New Features

[python-package] Add feature_names_in_ attribute for scikit-learn estimators (fixes #6279) @nicklamiller (#6310)
[R-package]: add num_trees_per_iter, num_trees, and num_iter methods @mayer79 (#6500)

🔨 Breaking

[c++] remove HDFS support (fixes #6436) @jameslamb (#6534)
[ci] [python-package] run macOS x86_64 tests on macOS 12 (Monterey), stop manually setting macOS wheel tags @jameslamb (#6487)

🚀 Efficiency Improvement

Avoid copy on Refit @cbourjau (#6478)

🐛 Bug Fixes

[python-package] Correctly recognize LGBMClassifier(num_class=2, objective="multiclass") as multiclass classification @RektPunk (#6524)
[cmake] Some improvements to handling of OpenMP on macOS @barracuda156 (#6489)
[python-package] respect 'verbose' setting when using custom objective function (fixes #6014) @jameslamb (#6428)
cmake: add missing lib_lightgbm_swig.so to lightgbmlib.jar on linux @shuttie (#6515)

📖 Documentation

[docs] update GitHub Actions badges in README @StrikerRUS (#6570)
[docs] Update badge for Link checks workflow @StrikerRUS (#6568)
[python-package] [docs] Expand class docs for Dataset @Plenitude-ai (#6558)
[docs] fix link to multiple OpenMP issue description @StrikerRUS (#6562)
[docs] Add NuGet version badge @StrikerRUS (#6549)
[docs] remove link to Roadmap (fixes #6556) @jameslamb (#6557)
[docs] remove outdated docs from the repo @StrikerRUS (#6552)
[docs] Add conda downloads badge @StrikerRUS (#6546)
[docs] update and simplify installation docs @jameslamb (#6536)
[doc] fix documentation for quantized training @shiyu1994 (#6528)
[docs] fix FAQ markdown @StrikerRUS (#6521)
[docs] [R-package] update cran-comments.md @jameslamb (#6499)
[docs] remove pmml redirect, simplify some other docs @jameslamb (#6490)

🧰 Maintenance

release v4.5.0 @jameslamb (#6538)
[ci] modify CodeQL settings @jameslamb (#6563)
[ci] revert clang-18 LD_LIBRARY_PATH workaround @jameslamb (#6559)
[ci] [R-package] help linker find libstdc++.so.1 in clang18 job (fixes #6553) @jameslamb (#6554)
[ci] update codeowners @jameslamb (#6542)
[ci] [R-package] use --no-xattrs when re-tarring CRAN-style package @jameslamb (#6540)
[ci] [R-package] add CI jobs covering more CRAN "additional checks", fix R_NO_REMAP warnings (fixes #6369) @jameslamb (#6523)
[ci] [R-package] add arm64 macOS R-package CI job (fixes #6481) @jameslamb (#6494)
[ci] restore aarch64 linux builds (fixes #6509) @jameslamb (#6527)
[test][python] fix pandas DeprecationWarning about is_sparse function @StrikerRUS (#6532)
fix cpp casting errors "Comparison of narrow type with wide type in loop condition" @StrikerRUS (#6533)
[python-package] avoid overwriting dependencies via 'build-python.sh install' @jameslamb (#6526)
[tests][python] fix nan in pandas bool column @StrikerRUS (#6530)
Remove template parameters from copy constructor @hgminh95 (#6514)
[ci] prevent lgb.model and lgb.pkl files being left behind after testing @nicklamiller (#6518)
[ci] [R-package] run 'R CMD check' as a foreground task @jameslamb (#6508)
[CMake] Use CMAKE_MSVC_RUNTIME_LIBRARY to apply /MT @hcho3 (#6484)
[ci] resolve shellcheck errors in .ci/check_python_dists.sh @Kunal-Singh-Dadhwal (#6503)
[ci] skip aarch64 linux job @jameslamb (#6517)
[R-package] Use Rf_-prefixed versions of protect/unprotect @david-cortes (#6502)
[ci] reduce repetition of BUILD_DIRECTORY in CI scripts @jameslamb (#6497)
[ci] remove OpenMP / MKL workaround in CI jobs @jameslamb (#6496)
[ci] [docs] fix link-checks job @jameslamb (#6495)
[python-package] Change build settings to set strict-config to false @Jorricks (#6493)
[ci] remove unnecessary package installations in CI @jameslamb (#6488)
chore: update dataset_loader.cpp @eltociear (#6483)
bump development version to 4.4.0.99 @jameslamb (#6485)

Open source →

Additional notes

v4.5.0

Compare

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Open source →

4.4.015 Jun 2024Deprecated

[python-package] remove uses of deprecated NumPy random number generation APIs, require 'numpy>=1.17.0' @jameslamb

Changes

💡 New Features

[ci] [python-package] add arm64 macOS wheels @jameslamb (#6391)
[python-package] Add support for NumPy 2.0, test against nightly versions of dependencies (fixes #6454) @jameslamb (#6467)
[R-package] expose start_iteration to dump/save/lgb.model.dt.tree @mayer79 (#6398)
[python-package] Allow to pass early stopping min delta in params @borchero (#6274)
[python-package] Allow to pass Arrow table with boolean columns to dataset @borchero (#6353)
[c++][fix] Support Quantized Training with Categorical Features on CPU @shiyu1994 (#6301)

🔨 Breaking

[python-package] remove uses of deprecated NumPy random number generation APIs, require 'numpy>=1.17.0' @jameslamb (#6468)
[python-package] drop Python 3.6 support, add Python 3.12 @jameslamb (#6459)
[cmake] [c++] use .dylib extension unconditionally on macOS @jameslamb (#6418)
ENH more stable gradient of CrossEntropy @lorentzenchr (#6327)
[R-package] Rename slice() to lgb.slice.Dataset() @david-cortes (#6293)

🚀 Efficiency Improvement

[R-package] Use ALTREP system to return C++-allocated arrays @david-cortes (#6213)
[R-package] Speed-up lgb.importance() @mayer79 (#6364)
Fix single row prediction performance in a multi-threaded environment @Ten0 (#6024)

🐛 Bug Fixes

[R-package] ensure use of interaction_constraints does not lead to features being ignored @mayer79 (#6377)
[R-package] skip integer categorical feature check when building dataset subset (fixes #6412) @jmoralez (#6442)
[cmake] always target Windows SDK v10.x when using Visual Studio generators (fixes #6448) @jameslamb (#6451)
upgrade CMake in dockerfile-cli (fixes #6420) @narumiruna (#6426)
remove unnecessary omp single that cause deadlock (fixes #6273) @morokosi (#6394)
[python-package] allow use of early_stopping_round<=0 to turn off early stopping (fixes #6401) @ddelzell (#6406)
[c++] Fix memory leak in Arrow table implementation @borchero (#6314)
Fix calculation of number of bins in FindGroup @CVPaul (#6019)

📖 Documentation

[docs] ensure pkgdown site index accurately reflects R-package public API (fixes #6444) @jameslamb (#6445)
[docs] document how to use a custom objective function via the C API @parsiad (#6396)
[docs] [ci] encourage use of cmake --build @jameslamb (#6368)
[docs] remove language about CUDA version being experimental (fixes #6340) @jameslamb (#6371)

🧰 Maintenance

release v4.4.0 @jameslamb (#6439)
[python-package] add a few type hints in LGBMModel.fit() @jameslamb (#6470)
[python-package] clarify max_depth warning and limit when it is emitted @jameslamb (#6402)
[ci] upgrade linters to latest version @jameslamb (#6472)
[ci] [R-package] add new linters from {lintr} 3.1.1 @jameslamb (#6471)
[python-package] make LGBMDeprecationWarning inherit from FutureWarning @jameslamb (#6447)
[ci] further simplify CI configurations @jameslamb (#6463)
[ci] fix CUDA 11.8 builds (fixes #6466) @jameslamb (#6465)
[ci] simplify CI configurations, parallelize compilation, test CUDA on Ubuntu 22.04 @jameslamb (#6458)
[ci]: Bump actions/checkout from 1 to 4 in the ci-dependencies group @dependabot (#6453)
[cmake] switch to FindCUDAToolkit @characat0 (#6457)
[R-package] [python-package] deprecate Dataset arguments to cv() and train() @jameslamb (#6446)
[ci] Add dependabot configuration @borchero (#6449)
[python-package] upgrade to scikit-build-core 0.9.3 @jameslamb (#6263)
deprecate HDFS support @jameslamb (#6443)
[c++] remove uses of '..' in headers @jameslamb (#6409)
[R-package] always name the shared library 'lightgbm', not 'lib_lightgbm' @jameslamb (#6432)
[R-package] [ci] Manually install 'Matrix' (fixes #6433) @jameslamb (#6434)
[ci] Skip Arrow tests on AppVeyor, use Intel macOS runners, upgrade to XCode 14.3 on macOS jobs, disable MacOS MPI jobs @borchero (#6425)
[ci] raise floors on CI dependencies @jameslamb (#6375)
[ci] make shell scripts stricter @jameslamb (#6266)
[python-package] prevent build-python.sh from modifying already-installed dependencies @jameslamb (#6403)
[ci] reduce hard-coding of host architecture @jameslamb (#6395)
[c++] remove unused variable 'need_connect_cnt' @jameslamb (#6410)
[ci] clean source directory at the beginning of every Azure DevOps build @jameslamb (#6416)
[ci] Fix Azure Pipeline Agents @shiyu1994 (#6407)
[ci] [R-package] re-enable r-sanitizers jobs (fixes #6367) @jameslamb (#6374)
[ci] prevent trailing whitespace, ensure files end with newline @jameslamb (#6373)
[ci] [docs] update some docs and CI dependencies @jameslamb (#6346)
[ci] [python-package] remove unused flake8 configuration @jameslamb (#6372)
[ci] put ceiling on graphviz in Python 3.7 jobs @jameslamb (#6370)
[ci] Fix R 3.6 tests, dask tests, compatibility with dask>=2024.3.1 @borchero (#6357)
[ci] [python-package] check for untyped definitions with mypy @jameslamb (#6339)
[ci] ignore ruff-format changes in git blame (fixes #6304) @jameslamb (#6345)
[c++] remove unnecessary include in CLI @jameslamb (#6342)
[ci] [python-package] enable ruff-format on all Python code @jameslamb (#6336)
[python-package] remove unused type alias @jameslamb (#6341)
[ci] [python-package] enforce 'pylint' checks (fixes #4308) @jameslamb (#6334)
[ci] [python-package] enable ruff-format on tests and examples @jameslamb (#6317)
[python-package] fix mypy error about pyarrow data @jameslamb (#6333)
[ci] remove unnecessary workarounds in R-package macOS jobs @jameslamb (#6331)
[ci] remove workflow_dispatch from no-response configuration @jameslamb (#6330)
[ci] fix no-response permissions @jameslamb (#6323)
[ci] enable ruff-format on some files, add pre-commit config @jameslamb (#6308)
[ci] ensure shell script exit codes are in range 0-255 @jameslamb (#6305)
[ci] fix installation of clang-18 (fixes #6306) @jameslamb (#6307)
[ci] [R-package] pin to older setup-pandoc for R 3.6 jobs (fixes #6298) @jameslamb (#6299)
bump development version to 4.3.0.99 @jameslamb (#6287)

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Additional notes

v4.4.0

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4.2.022 Dec 2023

✨ v4.2.0 of the R package is now available on CRAN ( link ), the first major release of the R package in 2+ years.

✨ v4.2.0 of the R package is now available on CRAN (link), the first major release of the R package in 2+ years.

✨ The Python package now accepts Apache Arrow Tables and Arrays (thanks @borchero!)

🔧 A critical bug in quantized training support is fixed

Changes

💡 New Features

[python-package] Allow to pass Arrow table for prediction @borchero (#6168)
[python-package] Allow to pass Arrow table and array as init scores @borchero (#6167)
[python-package] Allow to pass Arrow array as groups @borchero (#6166)
[python-package] Allow to pass Arrow array as weights @borchero (#6164)
[python-package] Accept numpy generators as random_state @david-cortes (#6174)
[python-package] Allow to pass Arrow array as labels @borchero (#6163)
[python-package] Allow to pass Arrow table as training data @borchero (#6034)

🔨 Breaking

[python-package] fix access to Dataset metadata in scikit-learn custom metrics and objectives @jameslamb (#6108)
[CUDA] drop CUDA 10 support, start supporting CUDA 12 (fixes #5789) @jameslamb (#6099)

🚀 Efficiency Improvement

[R-package] Fix inefficiency in retrieving pointers @david-cortes (#6208)
[CUDA] CUDA Quantized Training (fixes #5606) @shiyu1994 (#5933)

🐛 Bug Fixes

fix errors from MSVC '/permissive-' mode (fixes #6230) @Zhaojun-Liu (#6232)
[R-package] [c++] add tighter multithreading control, avoid global OpenMP side effects (fixes #4705, fixes #5102) @jameslamb (#6226)
[python-package] take shallow copy of dataframe in predict (fixes #6195) @jmoralez (#6218)
Fix null handling for Arrow data @borchero (#6227)
[R-package] use safer pattern for error formatting (fixes #6212) @jameslamb (#6216)
[python-package] fix libpath.py @shiyu1994 (#6192)
set explicit number of threads in every OpenMP parallel region @jameslamb (#6135)
ignore unknown parameters when loading from model file @jmoralez (#6126)
[python-package] [R-package] include more params in model text representation (fixes #6010) @jameslamb (#6077)
[fix] fix quantized training (fixes #5982) (fixes #5994) @shiyu1994 (#6092)
[python-package] Fix misdetected objective after multiple calls to LGBMClassifier.fit @david-cortes (#6002)

📖 Documentation

[docs] remove links to Laurae++ site @jameslamb (#6193)
[docs] reduce redirects in docs links @jameslamb (#6181)
[docs] fix broken links @jameslamb (#6161)

🧰 Maintenance

release v4.2.0 @jameslamb (#6191)
[ci] [R-package] allow more possibly-lost warnings from valgrind @jameslamb (#6233)
[ci] Upgrade Azure VMSS to use Mariner Linux @shiyu1994 (#6222)
Add msvc conformance check @Zhaojun-Liu (#6234)
[python-package] Add tests for passing Arrow arrays with empty chunks @borchero (#6210)
[R-package] change CRAN maintainer @jameslamb (#6224)
[CUDA] fix typo in error message @jameslamb (#6207)
[python-package] ignore mypy errors related to ctypes string buffers @jameslamb (#6198)
[python-package] consolidate pandas-to-numpy conversion code @jameslamb (#6156)
[R-package] standardize naming of internal functions @jameslamb (#6179)
[R-package] remove unreachable code @jameslamb (#6180)
allow new files in include/LightGBM @jameslamb (#6177)
[R-package] Use cat() instead of print() for metrics and callbacks @david-cortes (#6171)
[ci] resolve warning in tests @jameslamb (#6154)
[ci] use mamba instead of conda in macOS and Linux CI jobs @borchero (#6140)
factor out uses of omp_get_num_threads() and omp_get_max_threads() outside of OpenMP wrapper @jameslamb (#6133)
remove unnecessary allocations in HistogramSumReducer @jameslamb (#6132)
[ci] [R-package] enforce more {lintr} checks @jameslamb (#6130)
fix compiler warnings for CPP tests @jameslamb (#6124)
[ci] [R-package] test against R 4.3 on Windows @jameslamb (#6061)
[python-package] reorganize early stopping callback @jameslamb (#6114)
[python-package] simplify Dataset._compare_params_for_warning() @jameslamb (#6120)
[ci] fix sh-compatibility issue in build-cran-package.sh @jameslamb (#6118)
[python-package] remove unnecessary allocations in ctypes code @jameslamb (#6111)
[python-package] fix mypy errors in Dataset construction @jameslamb (#6106)
[ci] ensure correct R version is used on GitHub Actions (fixes #5640) @jameslamb (#6107)
[python-package] fix mypy error about eval result tuples @jameslamb (#6105)
[python-package] fix mypy error from Dataset.pandas_categorical @jameslamb (#6098)
[ci] Fix typo in dependencies @borchero (#6100)
[python-package] fix mypy errors related to eval result parsing in callbacks @jameslamb (#6096)
[python-package] mark EarlyStopException as part of public API @jameslamb (#6095)
[python-package] fix mypy errors related to eval result tuples @jameslamb (#6097)
update to fmt 10.1.1, fast_double_parser 0.7.0 @jameslamb (#6074)

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v4.2.0

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4.1.012 Sept 2023

Treat position bias via GAM in LambdaMART @metpavel

Changes

💡 New Features

Treat position bias via GAM in LambdaMART @metpavel (#5929)

🐛 Bug Fixes

Fix updates in random forest model using GOSS data sample strategy @mjmckp (#6017)
[R-package] Fix misdetected objective when passing lgb.Dataset instance to lightgbm() @david-cortes (#6005)
[python-package] make it possible to build wheels without internet connection (fixes #5979) @jameslamb (#6042)
fix percentile computation for regression objectives @zachary62 (#5848)
[CUDA] Set GPU device ID in threads @shiyu1994 (#6028)
[R-package] Fix error when passing categorical features to lightgbm() (fixes #6000) @david-cortes (#6003)
[R-package] limit number of threads used in tests and examples (fixes #5987) @jameslamb (#5988)

📖 Documentation

[python-package] [docs] Update key format of eval_hist in docstring example @Alnusjaponica (#5980)
[docs] add vaex-ml to list of external repositories @jameslamb (#6085)
[ci] [docs] fix broken ACM links @jameslamb (#6083)
[docs] Fix typo in README @kyleengel (#6071)
[docs] fix broken links @jameslamb (#6059)
Fix Python Dockerfile @GyuminJack (#5984)

🧰 Maintenance

Release v4.1.0 @jameslamb (#6076)
Remove superfluous todo from gitignore @borchero (#6081)
[python-package] simplify processing of pandas data @jameslamb (#6066)
[ci] [R-package] test against R 4.3 on Linux and macOS @jameslamb (#6075)
reduce verbosity of some log messages @jameslamb (#6073)
[python-package] remove CVBooster._append() @jameslamb (#6057)
[python-package] use dataclass for CallbackEnv @jameslamb (#6048)
[ci] [python-package] add more linting checks @jameslamb (#6049)
[ci] prevent lock-threads from locking issues with label 'feature request' @jameslamb (#6047)
[ci] add bot to lock inactive issues and PRs @jameslamb (#6037)
[ci] fix GPG key download for R Linux jobs (fixes #6038) @jameslamb (#6039)
[ci] enforce dask version to be >=2023.5.0 in some builds (fixes #6030) @shiyu1994 (#6032)
[ci] [R-package] use {lintr} 3.1 @jameslamb (#5997)
[python-package] replace np.find_common_type with np.result_type @jmoralez (#5999)
[ci] simplify CODEOWNERS @jameslamb (#5998)
[R-package] consolidate testing constants in helpers file @jameslamb (#5992)
[R-package] remove unused internal variables @jameslamb (#5991)
[ci] use newer h5py in AppVeyor jobs (fixes #5995) @jameslamb (#5996)
[python-package] make _InnerPredictor construction stricter @jameslamb (#5961)

Note

This release of the R package was not submitted to CRAN, due to the issues documented in #5987.

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v4.1.0

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