GitLab

* add pyupgrade

* add options for pyupgrade

* minor refinement

* add nondeterministic voxelization op

* fix lint

* fix lint

* resolve comments

* fix lint

* first commit

* Add copyright pre-commit-hook

* [Fix] fix some warnings in unittest

* [Impl] standardize some warnings

* [Fix] fix warning type in test_deprecation

* [Fix] fix warning type

* [Fix] continue fixing

* [Fix] fix some details

* [Fix] fix docstring

* [Fix] del useless statement

* [Fix] keep compatibility for torch < 1.5.0

* add ops (voxel) in mmdet3d

* add ops (voxel) in mmdet3d

* add ops (voxel) in mmdet3d

* refactor code

* update test

* update test

* update test

* refactor code

* refactor code

* refactor code

* fix typo

* fix typo