Added the from_string function to molecule #1124

	name: Testing

	on: [push]

	concurrency:
	group: "testing"
	cancel-in-progress: true

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install ruff==0.0.250 pytest pytest-cov
	pip install -e .
	- name: Lint with ruff
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	# Note, line length is put on a very high margin (200). PEP8 prefers a value of 79
	ruff --format=github --select=E9,F63,F7,F82 --target-version=py38 --line-length=250 .
	# default set of ruff rules with GitHub Annotations
	ruff --format=github --target-version=py38 --line-length=250 .
	- name: Test with pytest
	run: \|
	pytest --cov
	coverage html

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