fix undefined grad; apply pre-commit #122

	name: Python application

	on: [push]

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1
	- name: Set up Python 3.8
	uses: actions/setup-python@v1
	with:
	python-version: 3.8
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt

	- name: Lint with flake8
	run: \|
	pip install flake8
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Test with pytest
	run: \|
	pip install -U pip setuptools
	pip install tox
	pip install pytest
	python setup.py develop
	pytest --cov=src/
	- name: Codecov
	# You may pin to the exact commit or the version.
	# uses: codecov/codecov-action@29386c70ef20e286228c72b668a06fd0e8399192
	uses: codecov/[email protected]
	with:
	# Repository upload token - get it from codecov.io. Required only for private repositories
	token: # optional
	# Comma-separated list of files to upload
	fail_ci_if_error: true

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