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Initial release: tablespec - Python library for UMF table schemas
Introducing tablespec, a comprehensive Python library for working with table schemas in Universal Metadata Format (UMF). This library provides type-safe models, validation, profiling integration, and schema generation tools for data quality workflows. ## Core Features ### UMF Schema Models - Pydantic-based models for UMF format with full validation - Support for column metadata, validation rules, and relationships - LOB-specific nullable configuration (MD/MP/ME) - Comprehensive type system: VARCHAR, CHAR, TEXT, INTEGER, DECIMAL, FLOAT, DATE, DATETIME, BOOLEAN ### Great Expectations Integration - Baseline expectation generation from UMF metadata (deterministic, no profiling required) - Constraint extraction from existing GX suites back into UMF format - Schema validation using Great Expectations - Full round-trip: UMF ↔ Great Expectations ### Schema Generators - SQL DDL generation with LOB-specific nullable columns - PySpark schema generation - JSON Schema export - Comprehensive type mappings between formats ### Profiling Support - Spark DataFrame profiling → UMF conversion - Deequ profiling results → UMF conversion - Automatic column type inference and statistics extraction ### Table Validation (PySpark) - Full DataFrame validation against UMF specifications - Detailed validation reports with row-level failures - Integration with Great Expectations validation engine - Support for custom expectations and validation rules ### LLM Prompt Generators - Documentation generation prompts - Validation rule generation prompts - Relationship discovery prompts - Column-level validation guidance ## Project Structure - `src/tablespec/models/` - Pydantic UMF models - `src/tablespec/schemas/` - Schema generators and JSON schemas - `src/tablespec/profiling/` - Profiling integrations (Spark, Deequ) - `src/tablespec/validation/` - Table validation engine - `src/tablespec/prompts/` - LLM prompt generators - `src/tablespec/gx_*.py` - Great Expectations integration modules - `tests/unit/` - Unit tests (pure Python) - `tests/integration/` - Integration tests (requires external dependencies) ## Development Setup - Python 3.12+ required - Uses `uv` for fast dependency management - Ruff for formatting and linting - Pyright for type checking - Pytest with coverage reporting - Pre-commit hooks for automated quality checks ## Optional Dependencies - `tablespec[spark]` - Adds PySpark support for profiling and validation features ## CI/CD - Pre-commit workflow: Runs ruff format, ruff check, pyright, and pytest - Coverage workflow: Generates and uploads test coverage to Codecov - All checks automated via GitHub Actions ## Testing - Comprehensive unit test suite covering all core functionality - Integration tests for end-to-end workflows - Test fixtures for GX suites and validation reports - 100% coverage target for critical modules 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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‎.github/workflows/pre-commit.yml‎

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name: pre-commit
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on:
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push:
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branches: [ main ]
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pull_request:
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branches: [ main ]
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jobs:
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pre-commit:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- name: Install uv
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uses: astral-sh/setup-uv@v5
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with:
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version: "latest"
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- name: Set up Python 3.12
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run: uv python install 3.12
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- name: Install dependencies
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run: uv sync --all-extras --group dev
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- uses: pre-commit/action@v3.0.1
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with:
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extra_args: --all-files

‎.github/workflows/release.yml‎

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name: Release & Publish
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on:
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push:
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tags:
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- 'v*.*.*'
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permissions:
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contents: write
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pages: write
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id-token: write
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concurrency:
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group: release-${{ github.ref }}
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cancel-in-progress: false
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jobs:
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build:
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name: Build Distribution
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runs-on: ubuntu-latest
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steps:
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- name: Checkout code
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uses: actions/checkout@v4
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with:
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fetch-depth: 0 # Full history for version calculation
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- name: Set up Python
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uses: actions/setup-python@v5
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with:
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python-version: '3.12'
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- name: Install uv
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uses: astral-sh/setup-uv@v5
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with:
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enable-cache: true
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- name: Build package
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run: uv build
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- name: Verify build
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run: |
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ls -lh dist/
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echo "Built packages:"
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ls -1 dist/
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- name: Upload build artifacts
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uses: actions/upload-artifact@v4
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with:
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name: dist
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path: dist/
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retention-days: 90
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release:
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name: Create GitHub Release
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needs: build
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runs-on: ubuntu-latest
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steps:
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- name: Checkout code
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uses: actions/checkout@v4
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- name: Download build artifacts
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uses: actions/download-artifact@v4
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with:
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name: dist
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path: dist/
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- name: Extract release notes
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id: release_notes
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run: |
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TAG=${GITHUB_REF#refs/tags/}
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echo "tag=$TAG" >> $GITHUB_OUTPUT
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# Create release notes
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cat > release_notes.md << EOF
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## tablespec $TAG
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### Installation
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\`\`\`bash
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# From GitHub Pages index
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pip install tablespec==${TAG#v} --index-url https://easel.github.io/tablespec/simple/
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# With PySpark support
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pip install tablespec[spark]==${TAG#v} --index-url https://easel.github.io/tablespec/simple/
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\`\`\`
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### What's Changed
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See the [commit history](https://github.com/easel/tablespec/commits/$TAG) for details.
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### Artifacts
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- Source distribution (sdist): \`tablespec-${TAG#v}.tar.gz\`
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- Wheel distribution: \`tablespec-${TAG#v}-py3-none-any.whl\`
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EOF
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- name: Create GitHub Release
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uses: softprops/action-gh-release@v2
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with:
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files: dist/*
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body_path: release_notes.md
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draft: false
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prerelease: ${{ contains(steps.release_notes.outputs.tag, 'rc') || contains(steps.release_notes.outputs.tag, 'alpha') || contains(steps.release_notes.outputs.tag, 'beta') }}
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env:
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GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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build-index:
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name: Build PyPI Index for GitHub Pages
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needs: build
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runs-on: ubuntu-latest
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steps:
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- name: Checkout code
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uses: actions/checkout@v4
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- name: Download build artifacts
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uses: actions/download-artifact@v4
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with:
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name: dist
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path: dist/
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- name: Generate PyPI-compatible index
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run: |
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mkdir -p pages/simple/tablespec
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# Create root index.html
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cat > pages/index.html << 'EOF'
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<!DOCTYPE html>
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<html>
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<head>
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<title>tablespec - Private PyPI Repository</title>
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<style>
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body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; margin: 40px; }
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h1 { color: #0366d6; }
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code { background: #f6f8fa; padding: 2px 6px; border-radius: 3px; }
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pre { background: #f6f8fa; padding: 16px; border-radius: 6px; overflow-x: auto; }
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.container { max-width: 800px; margin: 0 auto; }
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.badge { display: inline-block; padding: 4px 8px; background: #0366d6; color: white; border-radius: 3px; font-size: 12px; margin: 4px; }
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</style>
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</head>
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<body>
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<div class="container">
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<h1>📊 tablespec</h1>
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<p><span class="badge">Python 3.12+</span> <span class="badge">Apache 2.0</span></p>
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<p>Python library for working with table schemas in Universal Metadata Format (UMF)</p>
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<h2>Installation</h2>
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<pre>pip install tablespec --index-url https://easel.github.io/tablespec/simple/</pre>
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<h2>Quick Start</h2>
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<pre>
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# Load and validate UMF schema
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from tablespec import load_umf_from_yaml, generate_sql_ddl
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umf = load_umf_from_yaml("schema.yaml")
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ddl = generate_sql_ddl(umf)
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print(ddl)
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# With PySpark support
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pip install tablespec[spark] --index-url https://easel.github.io/tablespec/simple/
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</pre>
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<h2>Available Packages</h2>
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<ul>
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<li><a href="simple/tablespec/">tablespec</a></li>
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</ul>
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<h2>Links</h2>
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<ul>
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<li><a href="https://github.com/easel/tablespec">GitHub Repository</a></li>
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</ul>
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</div>
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</body>
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</html>
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EOF
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# Create simple/index.html (PEP 503)
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cat > pages/simple/index.html << 'EOF'
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<!DOCTYPE html>
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<html>
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<head><title>Simple Index</title></head>
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<body>
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<h1>Simple Index</h1>
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<a href="tablespec/">tablespec</a><br/>
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</body>
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</html>
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EOF
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# Create package index with all versions
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cat > pages/simple/tablespec/index.html << 'PKGEOF'
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<!DOCTYPE html>
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<html>
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<head><title>Links for tablespec</title></head>
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<body>
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<h1>Links for tablespec</h1>
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PKGEOF
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# Add links to all distribution files
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for file in dist/*; do
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filename=$(basename "$file")
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# Calculate SHA256 hash
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hash=$(sha256sum "$file" | cut -d' ' -f1)
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echo " <a href=\"../../../releases/download/${GITHUB_REF#refs/tags/}/$filename#sha256=$hash\">$filename</a><br/>" >> pages/simple/tablespec/index.html
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done
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# Close HTML
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cat >> pages/simple/tablespec/index.html << 'PKGEOF'
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</body>
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</html>
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PKGEOF
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# Create .nojekyll to disable Jekyll processing
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touch pages/.nojekyll
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echo "Generated index structure:"
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find pages -type f -exec echo " {}" \;
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- name: Upload Pages artifact
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uses: actions/upload-pages-artifact@v3
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with:
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path: pages/
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deploy-pages:
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name: Deploy to GitHub Pages
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needs: build-index
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runs-on: ubuntu-latest
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permissions:
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pages: write
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id-token: write
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environment:
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name: github-pages
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url: ${{ steps.deployment.outputs.page_url }}
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steps:
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- name: Deploy to GitHub Pages
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id: deployment
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uses: actions/deploy-pages@v4
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verify:
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name: Verify Release
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needs: [release, deploy-pages]
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runs-on: ubuntu-latest
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steps:
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- name: Set up Python
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uses: actions/setup-python@v5
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with:
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python-version: '3.12'
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- name: Wait for GitHub Pages propagation
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run: sleep 60
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- name: Verify GitHub Pages installation
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run: |
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TAG=${GITHUB_REF#refs/tags/}
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VERSION=${TAG#v}
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# Try installing from GitHub Pages index
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pip install --index-url https://easel.github.io/tablespec/simple/ tablespec==$VERSION || echo "GitHub Pages index not yet available"
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- name: Summary
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run: |
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TAG=${GITHUB_REF#refs/tags/}
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cat << EOF
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✅ Release $TAG complete!
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📄 GitHub Pages: https://easel.github.io/tablespec/
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🏷️ GitHub Release: https://github.com/easel/tablespec/releases/tag/$TAG
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EOF

‎.github/workflows/test.yml‎

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name: Coverage
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on:
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push:
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branches: [ main ]
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pull_request:
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branches: [ main ]
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jobs:
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coverage:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- name: Install uv
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uses: astral-sh/setup-uv@v5
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with:
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version: "latest"
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- name: Set up Python 3.12
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run: uv python install 3.12
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- name: Install dependencies
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run: uv sync --all-extras --group dev
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- name: Run tests with coverage
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run: |
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uv run pytest --cov=src/tablespec --cov-report=xml --cov-report=term
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- name: Upload coverage reports to Codecov
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uses: codecov/codecov-action@v5
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with:
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file: ./coverage.xml
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fail_ci_if_error: false
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continue-on-error: true

‎.gitignore‎

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.abstra/
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# Visual Studio Code
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# Visual Studio Code specific template is maintained in a separate VisualStudioCode.gitignore
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# Visual Studio Code specific template is maintained in a separate VisualStudioCode.gitignore
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# that can be found at https://github.com/github/gitignore/blob/main/Global/VisualStudioCode.gitignore
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# and can be added to the global gitignore or merged into this file. However, if you prefer,
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# and can be added to the global gitignore or merged into this file. However, if you prefer,
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# you could uncomment the following to ignore the entire vscode folder
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# .vscode/
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marimo/_static/
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marimo/_lsp/
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__marimo__/
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.claude/settings.local.json

‎.pre-commit-config.yaml‎

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repos:
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- repo: https://github.com/astral-sh/ruff-pre-commit
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rev: v0.13.3
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hooks:
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- id: ruff-format
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name: ruff format
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- id: ruff
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name: ruff check
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args: [--fix]
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- repo: local
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hooks:
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- id: pyright
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name: pyright
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entry: uv run pyright src/
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language: system
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types: [python]
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pass_filenames: false
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- id: pytest
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name: pytest
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entry: uv run pytest
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language: system
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types: [python]
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pass_filenames: false
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stages: [commit]

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