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* [dask] use keyword args for internal function calls

* add missing comma

* Update python-package/lightgbm/dask.py
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* revert whitespace changes

* test style
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* Update test_dual.py

* Update .vsts-ci.yml

* Update .vsts-ci.yml

* Update test_dual.py

* Update .vsts-ci.yml

* Update .vsts-ci.yml

* Update .vsts-ci.yml

* move all submodules to external_libs folder

* Update .Rbuildignore

* Update MANIFEST.in

* Update .appveyor.yml

* Update CMakeLists.txt

* Update build_r.R

* Update test.sh

* Update setup.py

* Update CMakeLists.txt

* Update test.sh

* Update setup.py

* Update conf.py

* Update MANIFEST.in

* Update LightGBM.vcxproj

* continue

* test

* test

* Update setup.py

* hotfix

* revert CI tests

* adding pred_contrib support

* add tests

* linting

* remove raw_score

* add pred kwargs

* faster tests

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* changes to tests

* Update tests/python_package_test/test_dask.py
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* ranker support wip

* fix ranker tests

* fix _make_ranking rnd gen bug, add sleep to help w stoch binding port failed exceptions

* add wait_for_workers to prevent Binding port exception

* another attempt to stabilize test_dask.py

* requested changes: docstrings, dask_ml, tuples for list_of_parts

* fix lint bug, add group param to test_ranker_local_predict

* decorator to skip tests with errors on fixture teardown

* remove gpu ranker tests, reduce make_ranking data complexity

* another attempt to
silence client, decorator does not silence fixture errors

* address requested changes on 1/20/20

* skip test_dask for all GPU tasks

* address changes requested on 1/21/21

* issubclass instead of __qualname__
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* parity in group docstr with sklearn
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* _make_ranking docstr cleanup
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* TST Migrates tset_engine.py to pytest

* ENH Apply suggestions

* ENH Uses temp path

* ENH Fixes typos

By using a unique lock instead of the shared lock the timings are very similar,
but predictions are correct.

Even so, by designing a small C++ benchmark with a very simple LGBM model,more threads on a simple model are slower than
the single-thread case. This is probably due to very small work units,
the lock contention overhead increases.

We should in the future benchmark with more complex models to see if supporting
threading on these calls is worth it in performance gains.

If not, then we could choose to not to provide thread-safety and remove
the locks altogether for maximal throughput.

See https://github.com/microsoft/LightGBM/issues/3751 for timings.

See gist for benchmark code:

  https://gist.github.com/AlbertoEAF/5972db15a27c294bab65b97e1bc4c315

[dask] allow parameter aliases for local_listen_port, num_threads, tree_learner (fixes #3671) (#3789)

* [dask] allow parameter aliases for tree_learner and local_listen_port (fixes #3671)

* num_thread too

* Apply suggestions from code review
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* empty commit
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* Update test.sh

* Update test.sh

* Update setup.sh

* Update test_windows.ps1

* Update test_windows.ps1

* Update test_windows.ps1

* Update .vsts-ci.yml

* Update .vsts-ci.yml

* Update .vsts-ci.yml

* Update .vsts-ci.yml

* Update test_windows.ps1

* Update .vsts-ci.yml

* fix docs

* Update basic.py

* Update engine.py

* [R-package] Add GPU install options (fixes #3765)

* whitespace

* linting

* Update build_r.R
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* speed up tests

* [dask] reduce test times

* Update .linkcheckerrc

* Update .linkcheckerrc

* [python-package] expand documentation on 'group' for ranking task

* add R package

* update Query Data section

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* fix typo in group example

* regenerate parameters

* Apply suggestions from code review
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* regenerate R docs
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* Cleanup predictor

* Cleanup SingleRowPredictor

* Update src/application/predictor.hpp
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* Update src/application/predictor.hpp
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* Update src/application/predictor.hpp
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* remove unused params from tests for the speedup

* Update test_lgb.Booster.R

* [R-package] enable use of trees with linear models at leaves (fixes #3319)

* remove problematic pragmas

* fix tests

* try to fix build scripts

* try fixing pragma check

* more pragma checks

* ok fix pragma stuff for real

* empty commit

* regenerate documentation

* try skipping test

* uncomment CI

* add note on missing value types for R

* add tests on saving and re-loading booster

* starting work

* fixed port-binding issue on localhost

* minor cleanup

* updates

* getting closer

* definitely working for LocalCluster

* it works, it works

* docs

* add tests

* removing testing-only files

* linting

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* remove duplicated code

* remove unnecessary listen()
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* TST Migrates test_basic.py to use pytest

* STY Linting

* CI Force CI to run

* Update optional_checks.yml

* Update get_workflow_status.py

* Update cuda_tree_learner.cpp

* Update cuda_tree_learner.h

* Update cuda.yml

* improve experience with optional GitHub workflows

* Update README.md

* Update r_artifacts.yml

* Update optional_checks.yml

* continue

* Update triggering_comments.yml

* Update README.md

* Update r_artifacts.yml

* Update r_artifacts.yml

* Update r_artifacts.yml

* Update r_valgrind.yml

* Update r_artifacts.yml

* Update r_valgrind.yml

* Update r_valgrind.yml

* Update r_valgrind.yml

* add docstrings to fix lint

* better formatting for multi-line commands

* [ci] move CI jobs from Travis to Azure DevOps (fixes #3519)

* comment out other CIs to avoid wasting cycles

* try without docker

* add container back

* stop using --user in pip install

* run check-docs and lint without container

* job names

* move more jobs to Azure-hosted Linux pool

* fix PATH for check-docs

* uncomment other CI

* uncomment windows

* remove uses of maxParallel

* try moving macos-latest jobs to GitHub Actions

* fix config

* fix missing conda env

* set Python version

* remove commented-out code

* add more to GitHub Actions

* try to fix GPU

* remove static_analysis to prevent conflicts with #3726

* change workflow name

* try using ubuntu:latest docker

* fix conda

* trying to find where permissions first break

* add workaround for sudo

* please azure please

* image syntax

* more sudo

* noninteractive

* LC_ALL

* more  sudo

* more stuff

* CONDA dir

* paths

* get path

* missing CONDA

* fix path stuff

* more tests

* fix graphviz

* stuff

* more graphviz

* install xorg-libxau

* graphviz works, run more jobs

* stuff

* enable more tests

* uncomment GitHub Actions

* uncomment all other CIs

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* add travis.yml to Rbuildignore

* add Rbuildignore rule for fmt

* add libomp for clang builds

* changes from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* DOC: add conda-forge install instructions

* DOC: add conda-forge instructions

* DOC: fix hyperlink

* DOC: point to installation guide

* add detailed

* Update python-package/README.rst
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* Update python-package/README.rst
Co-authored-by: James Lamb <jaylamb20@gmail.com>

* rm characters

* add pip install

* add :

* Update python-package/README.rst
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Update python-package/README.rst
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* remove pip from header

* channel
Co-authored-by: James Lamb <jaylamb20@gmail.com>
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* [ci] move Python Mac jobs from Travis to GitHub Actions

* alphabetize

* fix workflow

* fix name

* fix os

* new workflow

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* changes from code review

* swap compilers

* swap compilers back

* Apply suggestions from code review
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>

* Update .github/workflows/python_package.yml
Co-authored-by: Nikita Titov <nekit94-08@mail.ru>