Optimize group_by when it returns objects instead of indexes #1526 #731

	name: Pylint

	on: [push, pull_request]

	jobs:
	pylint:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- 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 pylint
	if [ -f requirements_dev.txt ]; then pip install -r requirements_dev.txt; fi
	- name: Analysing the code with pylint
	run: \|
	python -m pylint --rcfile .github/linters/.python-lint src

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