Tidy and add tests for modify module #850

	name: Pytest

	on:
	push:
	branches:
	- master
	pull_request:
	types: [opened, synchronize]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
	fail-fast: false
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Check python version
	run: \|
	python_version=$(python --version)
	echo "Python version $python_version"
	- name: Install dependencies
	run: \|
	python -m pip install ".[all]"
	- name: Lint with flake8
	run: \|
	python -m pip install flake8
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Lint with black
	run: \|
	python -m pip install black
	black . -l 88 --check --diff
	- name: Lint with isort
	run: \|
	python -m pip install isort
	isort --profile black . --check
	- name: Test with pytest
	run: \|
	python -m pip install coverage pytest pytest-benchmark pytest-cov
	pytest --cov-report=term-missing --cov-config=pyproject.toml --cov=bigtree

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