[develop] MET_verification: use modules met, metplus (#826) #2

	name: Python unittests
	on:
	push:
	branches:
	- develop
	- 'release/*'
	pull_request:
	branches:
	- develop
	- 'release/*'
	workflow_dispatch:

	env:
	UNIT_TEST: True

	defaults:
	run:
	shell: bash
	jobs:

	python_unittests:
	name: Python unittests
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v2

	# Install dependencies
	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install python3 python3-pip netcdf-bin
	sudo pip3 install pyyaml jinja2==2.11 f90nml
	sudo pip3 install numpy matplotlib basemap

	# Run python unittests
	- name: Run python unittests
	run: \|
	./manage_externals/checkout_externals ufs-weather-model workflow-tools
	# exclude test_retrieve_data that is tested in functional test
	export PYTHONPATH=$(pwd)/ush:$(pwd)/ush/python_utils/workflow-tools:$(pwd)/ush/python_utils/workflow-tools/src
	python3 -m unittest -b tests/test_python/*.py

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