fix BRDF fallback lookup failure #225

	name: Lint-flake8

	on: [push, pull_request]

	jobs:
	flake8_py3:
	runs-on: ubuntu-latest
	steps:
	- name: Setup Python
	uses: actions/setup-python@v1
	- name: Checkout PyTorch
	uses: actions/checkout@master
	- name: Install flake8
	run: pip install flake8
	- name: Run flake8
	uses: suo/flake8-github-action@releases/v1
	with:
	checkName: 'flake8_py3' # NOTE: this needs to be the same as the job name
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Provide feedback