Restore PY3 compat #2

	# This workflow will install Python dependencies, run tests and lint with a single version of Python
	# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python

	name: Python Testing

	on:
	push:
	branches: [ "master" ]
	pull_request:
	branches: [ "master" ]

	jobs:
	run-tests:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: [ "2.7", "3.11" ]

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3
	if: matrix.python-version == '3.11'
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install Python 2
	if: matrix.python-version == '2.7'
	run: \|
	sudo apt update
	sudo apt install python2 python-pip
	sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 1
	sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 2
	printf '1\n' \| sudo update-alternatives --config python
	cd /usr/bin
	sudo ln -s /usr/bin/pip2 ./pip

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements-dev.txt
	pip install -e .

	- name: Tests
	run: \|
	mamba

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