fix: use 'is' for type comparison as suggested by new flake8 #208

	name: Precheck Tests

	on:
	push:
	pull_request:
	workflow_dispatch:

	jobs:
	test-precheck:
	runs-on: ubuntu-latest
	env:
	PDK_ROOT: /home/runner/pdk
	PDK_VERSION: dd7771c384ed36b91a25e9f8b314355fc26561be

	steps:
	- name: Check out code
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.11'
	cache: 'pip'

	- name: Install dependencies
	working-directory: precheck
	run: pip install -r requirements.txt

	- name: Install Sky130 PDK
	uses: TinyTapeout/volare-action@v2
	with:
	pdk_name: sky130
	pdk_version: ${{ env.PDK_VERSION }}
	pdk_root: ${{ env.PDK_ROOT }}

	- name: Install Nix
	uses: rikhuijzer/[email protected]
	with:
	key: nix-${{ hashFiles('precheck/default.nix') }}
	nix_file: 'precheck/default.nix'

	- name: Build Nix packages
	working-directory: precheck
	run: nix-build

	- name: Run tests
	working-directory: precheck
	run: nix-shell --run "pytest"

Provide feedback