Add missing type hints #32

	name: CI

	on:
	pull_request:
	branches:
	- master
	paths:
	- '**.py'

	jobs:
	code-quality:
	runs-on: windows-latest
	steps:
	- uses: actions/checkout@v1
	- name: Set up Python 3.7
	uses: actions/setup-python@v1
	with:
	python-version: 3.7
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	pip install flake8 flake8-eradicate pylint mypy bandit
	mypy --install-types --non-interactive
	- name: Lint with flake8
	run: \|
	# 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
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	- name: Lint with pylint
	run: \|
	pylint ./library --disable=E,W1202 --exit-zero
	pylint ./library --extension-pkg-whitelist=wx --errors-only
	- name: Type checking with mypy
	run: mypy --ignore-missing-imports --disallow-untyped-defs main.py
	- name: Lint with bandit
	run: bandit -r .

Provide feedback