lint

add arxiv url of DAL #31

# to view logs

	name: lint

	on: [push, pull_request]

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	lint:
	runs-on: ubuntu-18.04
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.7
	uses: actions/setup-python@v1
	with:
	python-version: 3.7
	- name: Install linting dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install flake8==3.8.3 isort==5.10.1 yapf==v0.30.0 interrogate
	- name: Lint with flake8
	run: flake8 .
	- name: Lint with isort
	run: isort --recursive --check-only --diff mmdet3d/ tests/ examples/
	- name: Format python codes with yapf
	run: yapf -r -d mmdet3d/ tests/ examples/
	- name: Check docstring
	run: interrogate -v --ignore-init-method --ignore-module --ignore-nested-functions --exclude mmdet3d/ops --ignore-regex "__repr__" --fail-under 95 mmdet3d

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