Add ruff linting and formatting configuration

[chenpeizhi]

Use ruff for linting and formatting. Clean up the codebase.

[Copilot]

Pull Request Overview

This PR introduces ruff as a linting and formatting tool for the codebase and applies automated cleanup to address various code quality issues including unused imports, unused variables, and style violations.

Key changes:

• Added ruff configuration in .ruff.toml with Python 3.12 target, 79-character line length, and selective rule ignores
• Updated pyproject.toml to add ruff>=0.14.5, pytest, and pre-commit as dev dependencies
• Applied automated code cleanup across multiple files to remove unused imports/variables and fix style issues

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.ruff.toml	New ruff configuration file with sensible defaults for the project
pyproject.toml	Added dev dependency group with ruff, pytest, and pre-commit
uv.lock	Updated lock file with new dependencies including ruff, pre-commit, and their transitive dependencies
tests/spin_one_half_test.py	Removed unused variable p
tests/name_injection_test.py	Added noqa: F821 comments for intentionally undefined names from injection
tests/genquad_test.py	Removed unused pytest import
drudge/utils.py	Removed unused ManagedProperties import
drudge/nuclear.py	Reordered variable assignments to avoid unused variable warnings
drudge/drudge.py	Fixed style issues: != to is not, lambda to def, added missing import in docstring
docs/conf.py	Added noqa: E402 for module-level import after other code

[Copilot]

Pull Request Overview

Copilot reviewed 47 out of 49 changed files in this pull request and generated 5 comments.

Comments suppressed due to low confidence (1)

drudge/su2.py:1

• Extra trailing comma creates a single-element tuple for phase assignment. This should be phase = _NEG_UNITY ** (JOf(k2) + mk2) without the trailing comma.

"""Drudge for SU(2) Lie algebra."""

[coveralls]

Pull Request Test Coverage Report for Build 19417954037

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 349 of 446 (78.25%) changed or added relevant lines in 15 files are covered.
• 25 unchanged lines in 6 files lost coverage.
• Overall coverage decreased (-0.1%) to 87.887%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
drudge/report.py	22	24	91.67%
drudge/_tceparser.py	17	20	85.0%
drudge/drs.py	19	22	86.36%
drudge/wick.py	6	9	66.67%
drudge/genquad.py	12	18	66.67%
drudge/utils.py	19	25	76.0%
drudge/fock.py	45	53	84.91%
drudge/nuclear.py	41	60	68.33%
drudge/term.py	58	77	75.32%
drudge/drudge.py	83	111	74.77%

Files with Coverage Reduction	New Missed Lines	%
drudge/fock.py	1	94.32%
drudge/report.py	1	80.95%
drudge/term.py	2	90.58%
drudge/wick.py	3	76.88%
drudge/drudge.py	5	89.66%
drudge/nuclear.py	13	72.75%

Totals
Change from base Build 19239773526:	-0.1%
Covered Lines:	3693
Relevant Lines:	4202

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💛 - Coveralls