added input valadation #307

	# 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:
	push:
	branches: [master]
	pull_request:
	branches: [master]

	jobs:
	lint:
	runs-on: ubuntu-latest

	steps:
	- name: Update apt
	run: sudo apt-get update
	- name: Install ldap dependencies
	run: sudo apt-get install libldap2-dev libsasl2-dev
	- 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
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	- name: Lint with black
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	black --check proxstar
	- name: Lint with pylint
	run: \|
	pylint proxstar

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