fix read gzip, add test case #598

	# Workflow derived from https://github.com/r-lib/actions/tree/master/examples
	# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
	on:
	push:
	branches: [main, master]
	paths:
	- '.github/**'
	- 'lang/python/**'
	pull_request:
	branches: [main, master]
	paths:
	- '.github/**'
	- 'lang/python/**'

	name: Python package

	defaults:
	run:
	working-directory: lang/python

	jobs:
	python-unittest:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [ '3.8' ]
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	pip install -r requirements.txt
	pip install jsondiff
	- name: Install package
	run: \|
	python setup.py install
	- name: Unit tests
	run: \|
	python -m unittest discover

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