Extend type hint analyzer to track variables, type aliases, and decorators with comprehensive documentation

[Copilot]

What do these changes do

Extends type_hint_analyzer.py to analyze type completeness for class variables, instance variables, module variables, type aliases, and function decorators per typing.python.org type completeness guidelines. Includes comprehensive code review and enhanced documentation of the analyzer implementation, design decisions, and usage patterns.

What was wrong

The analyzer only tracked function/method signatures. Variables (class-level, instance, module-level), type aliases, and decorator usage were not analyzed, leaving ~1000 untracked items affecting type completeness assessment. Additionally, the README lacked comprehensive documentation of the analyzer's implementation details, architecture, and design rationale.

How this fixes it

AST Analysis Extensions:

• Detects annotated assignments (AnnAssign) at class, instance, and module scope
• Detects non-annotated assignments (Assign) for completeness comparison
• Identifies TypeAlias annotations via annotation node inspection
• Extracts decorator names from function decorator_list nodes

Output Additions:

• New CSV files: class_variables_no_hints.csv, instance_variables_no_hints.csv, module_variables_no_hints.csv, type_aliases.csv
• Enhanced JSON structure with variable/type alias statistics
• Decorator column added to function CSV outputs

Documentation Enhancements:

• Comprehensive README expanded from 154 to 430 lines
• Implementation details with AST-based analysis explanation
• Performance metrics (analyzes ~720 functions, ~960 variables in 2-3 minutes)
• Complete CSV schema documentation
• Code quality metrics (95.7% docstring coverage)
• Key design decisions explained (AST-based analysis, visitor pattern, priority system)
• Known limitations and potential improvements documented
• Contribution guidelines added
• Example output and JSON structure included

Results (repository scan):

Variables: 959 total (5.21% typed)
  - Class: 25
  - Instance: 426  
  - Module: 508
Functions: 720 (82.22% typed)

Your checklist for this pull request

• Passed code styles and structures
• Passed code linting checks and unit test

Original prompt

Update this type hint analyser script
https://github.com/PyThaiNLP/pythainlp/blob/dev/build_tools/analysis/type_hint_analyzer.py
to also find complete/incomplete annotations for

• class variables, instance variables, and methods
• decorators
• type aliases
• variables

Then update the associated JSON to CSV generator
https://github.com/PyThaiNLP/pythainlp/blob/dev/build_tools/analysis/generate_csv.py

See https://github.com/PyThaiNLP/pythainlp/blob/dev/build_tools/analysis/README.md for the current usage and structure of the script. Update this README accordingly.

Use the type completeness information from
https://typing.python.org/en/latest/guides/libraries.html#type-completeness

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[coveralls]

coverage: 65.726% (+0.2%) from 65.571%
when pulling 4f7e95b on copilot/update-type-hint-analyser
into 9e2ea22 on dev.

[bact]

@copilot Add a GitHub workflow to run the analyzer and the generator scripts every time there is a push to the dev branch.

Use ubuntu-latest and Python 3.9 as a runner.

[Copilot]

@copilot Add a GitHub workflow to run the analyzer and the generator scripts every time there is a push to the dev branch.

Use ubuntu-latest and Python 3.9 as a runner....

Added GitHub workflow in commit 8019e77. The workflow:

• Runs on every push to dev branch
• Uses ubuntu-latest and Python 3.9
• Executes both type_hint_analyzer.py and generate_csv.py
• Uploads JSON and CSV results as artifacts (30-day retention)
• Displays analysis summary in GitHub Actions UI with completeness percentages

The workflow triggers on changes to pythainlp/**, build_tools/analysis/**, or the workflow file itself.

[bact]

@copilot review the analyzer code and update the analyzer README

[Copilot]

@copilot review the analyzer code and update the analyzer README

Completed comprehensive code review and README enhancement in commit 4f7e95b.

Code Review Findings:

• Documentation: 95.7% docstring coverage (22/23 functions)
• Code quality: Passes Ruff linting, proper type hints throughout
• Architecture: Well-structured AST visitor pattern with clear separation of concerns

README Enhancements:

• Added detailed implementation overview with AST analysis explanation
• Documented performance metrics (analyzes ~720 functions, ~960 variables in 2-3 min)
• Included complete CSV schema documentation
• Explained key design decisions (AST-based analysis, stateful visitor, priority system)
• Listed known limitations and potential future improvements
• Added contribution guidelines
• Included example output showing typical analysis results

The README grew from 154 to 430 lines with comprehensive technical documentation covering implementation details, usage patterns, and architectural decisions.

[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud