Implemented write functions to write pyvnt trees to a file #4

	# This workflow will install Python dependencies and run tests with a variety of Python versions
	# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python

	name: Package testing

	on:
	push:
	branches: [ "main", "dev" ]
	pull_request:
	branches: [ "main", "dev" ]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ["3.9", "3.10", "3.11"]

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v3
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies and build package
	run: \|
	python -m pip install --upgrade pip
	python -m pip install pytest anytree setuptools wheel build
	python -m build
	pip install dist/*.whl
	- name: Test with pytest
	run: \|
	pytest -v

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