Fix missing altair import for tooltip caught by treon in CI #15

	name: unit tests

	on:
	push: # run on every push or PR to any branch
	pull_request:

	jobs:
	python-unit:
	name: Python unit tests
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: 3.9

	# Base python cache on the hash of requirements.txt file
	# if the file changes, the cache is invalidated.
	- name: Cache pip
	uses: actions/cache@v3
	with:
	path: ~/.cache/pip
	key: pip-${{ hashFiles('requirements.txt') }}
	restore-keys: \|
	pip-${{ hashFiles('requirements.txt') }}
	pip-

	- name: Install python dependencies
	run: pip install -r requirements.txt

	- name: Install test dependencies
	run: pip install pytest treon

	- name: Run pytest for python utility code
	run: python -m pytest

	# run treon on specific notebooks for now, since not all are passing!
	- name: Run treon to check notebooks
	run: treon speculative_reading/HemingwayBorrowing.ipynb speculative_reading/PartialBorrowers.ipynb

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