Speedup env(...) by 25x, and speedup writing to parquet by 80x #924

	on:
	pull_request:
	types: [opened, reopened, synchronize]
	paths:
	- 'lilac/**'
	- '*/.py'
	- 'poetry.lock'
	- 'poetry.toml'
	- 'pyproject.toml'
	- 'mypy.ini'
	- 'pytest.ini'
	- '.python-version'
	- '.env'
	- '.coveragerc'
	- '.github/workflows/python.yml'
	- 'scripts/**'

	jobs:
	build:
	runs-on: ubuntu-latest
	timeout-minutes: 15

	steps:
	- uses: actions/checkout@v3
	- name: Install poetry
	run: pipx install poetry
	- uses: actions/setup-python@v4
	with:
	python-version: '3.9'
	cache: 'poetry'
	- name: Install dependencies
	# Re-install pytorch for cpu to avoid errors that cuda was not found
	run: \|
	./scripts/setup_py.sh
	poetry run pip3 install --force-reinstall --pre torch==2.* --index-url https://download.pytorch.org/whl/nightly/cpu

	# We run testing before linting since testing, surprisingly, is much faster.
	- name: Test python
	run: \|
	poetry run ./scripts/test_py.sh

	- name: Lint python
	run: \|
	poetry run ./scripts/lint_py.sh

Provide feedback