fix: Use count() in combination with iterator(), instead of len() #343

	name: Lint
	on: [push, pull_request]
	env:
	BASEDIR: https://raw.githubusercontent.com/open-contracting/standard-maintenance-scripts/main
	jobs:
	build:
	if: github.event_name == 'push' \|\| github.event.pull_request.head.repo.full_name != github.repository
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v4
	with:
	python-version: '3.11'
	cache: pip
	cache-dependency-path: '*/requirements.txt'
	- id: changed-files
	uses: tj-actions/changed-files@v37
	- uses: pre-commit/[email protected]
	with:
	extra_args: pip-compile --files ${{ steps.changed-files.outputs.all_changed_files }}
	- shell: bash
	run: curl -s -S --retry 3 $BASEDIR/tests/install.sh \| bash -
	- shell: bash
	run: curl -s -S --retry 3 $BASEDIR/tests/script.sh \| bash -
	- run: pip install -r requirements_dev.txt
	- env:
	# libcoveocds is optional (try-except block).
	# https://github.com/OpenDataServices/lib-cove/pull/123
	STANDARD_MAINTENANCE_SCRIPTS_IGNORE: libcove,libcoveocds
	STANDARD_MAINTENANCE_SCRIPTS_FILES: requirements_nongpl.in
	run: pytest /tmp/test_requirements.py

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