chore(sdk): use a singleton factory pattern to instantiate the client, improve docs on using it #315

	name: CI

	on:
	- pull_request

	jobs:
	code-quality:
	name: Code quality checks
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 1

	- name: Set up Python 3.8
	uses: actions/setup-python@v2
	with:
	python-version: 3.8

	- uses: actions/cache@v1
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ hashFiles('setup.py') }}
	restore-keys: \|
	${{ runner.os }}-pip-

	- name: Install dev dependencies
	run: \|
	python -m pip install -e .[dev]
	if: steps.cache.outputs.cache-hit != 'true'

	- name: Check formatting with black
	run: \|
	black --check .

	- name: Lint with flake8
	run: \|
	flake8 posthog --ignore E501

	- name: Check import order with isort
	run: \|
	isort --check-only .

	tests:
	name: Python tests
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1
	with:
	fetch-depth: 1

	- name: Set up Python 3.7
	uses: actions/setup-python@v1
	with:
	python-version: 3.7

	- name: Install requirements.txt dependencies with pip
	run: \|
	python -m pip install -e .[test]

	- name: Run posthog tests
	run: \|
	pytest --verbose --timeout=30

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