Faster `Charclass` instantiation #76

	# This workflow will install Python dependencies, run tests and lint with a single version of Python
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: Python application

	on:
	pull_request:
	branches:
	- '**'

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.8
	uses: actions/setup-python@v2
	with:
	python-version: "3.8"
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.dev.txt
	- name: Lint with isort
	run: \|
	isort --quiet --diff --check .
	- name: Check formatting with black
	run: \|
	black --diff --check .
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 --count --statistics --show-source --select=E9,F63,F7,F82 .
	# exit-zero treats all errors as warnings
	flake8 --count --statistics --exit-zero .
	- name: Lint with pylint
	run: \|
	pylint --recursive=true .
	- name: Check with mypy
	run: \|
	mypy greenery
	- name: Test with pytest
	run: \|
	pytest

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