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Add modernization summary document
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‎MODERNIZATION_SUMMARY.md‎

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# Modernization Summary - pythonplot.com
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## ✅ Completed Successfully
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### Infrastructure Modernization
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1. **Python 3.6 → 3.11** - Updated runtime and all dependencies
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2. **Conda → uv** - Modern package management with `uv sync`
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3. **Travis CI → GitHub Actions** - Modern CI/CD with Netlify deployment
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4. **Makefile** - Auto-dependency setup with `make` just works
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5. **R Integration** - Separate system R install with automated package setup
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### Dependency Updates
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All plotting libraries updated to 2025 versions:
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- pandas 2.3.3
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- matplotlib 3.10.7
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- seaborn 0.13.2
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- plotnine 0.15.1
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- plotly 6.3.1 (with Kaleido 1.1.0 + auto Chrome install)
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- altair 5.5.0 (with vl-convert-python 1.8.0)
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- statsmodels 0.14.5
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### API Compatibility Fixes
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1. **Seaborn 0.13+**: Fixed all `size` → `height` parameter changes (4 instances)
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2. **Plotly 5+**: Removed authentication requirement, using Kaleido v1 with Chrome
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3. **Altair 5**: Added vl-convert-python dependency
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### Build System
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- ✅ `make` auto-installs all dependencies (Python, R, Chrome)
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- ✅ `make test` runs pytest
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- ✅ `make render` executes notebook and generates site
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- ✅ Notebook executes successfully (32.9MB output)
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### CI/CD
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- ✅ GitHub Actions workflow configured
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- ✅ Netlify deployment (production + preview)
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- ✅ Auto Chrome installation in CI
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## 🔄 Known Issues
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### Altair PNG Rendering
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**Status**: Altair charts execute but don't produce PNG output in notebooks
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**Issue**: Altair 5 with vl-convert-python renders charts as Vega specs (HTML/JSON) by default, not PNGs. The `alt.renderers.enable('png')` doesn't automatically convert notebook outputs to PNG.
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**Options to fix**:
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1. **Modify Altair cells** to explicitly save PNGs:
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```python
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chart = alt.Chart(data).mark_bar()...
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chart.save('temp.png')
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from IPython.display import Image
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Image('temp.png')
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```
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2. **Use Altair's `.show()` with PNG format** (requires additional setup)
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3. **Skip Altair in rendered output** (not ideal for a comparison site)
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4. **Post-process notebook** to convert Vega specs to PNG using vl-convert
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**Impact**: Altair examples missing from rendered site. All other libraries work.
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## 📊 Build Statistics
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**Successful notebook execution:**
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- Input: Examples.ipynb
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- Output: Examples.e7639cc.ipynb (32.9MB)
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- All R, pandas, matplotlib, seaborn, plotnine, and plotly examples executed
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- Altair examples executed but need PNG conversion
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**Packages installed:** 147 Python packages + 2 R packages + Chrome
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## 🚀 Next Steps
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### Priority 1: Fix Altair PNG Rendering
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- Investigate vl-convert PNG export in Jupyter context
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- Consider modifying Altair cells to explicitly save PNGs
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- Or implement post-processing step
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### Priority 2: Test Full Build
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- Resolve Altair issue
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- Run full `make render` successfully
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- Verify all plots appear in `web/img/plots/`
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- Check `web/index.html` displays correctly
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### Priority 3: Deploy Preview
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- Run `netlify deploy --dir=web` for preview
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- Verify site works with updated libraries
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- Test all interactive elements
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### Priority 4: Documentation
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- Update CLAUDE.md with Altair workaround
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- Document known issues
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- Add troubleshooting guide
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## 📝 Commits Made
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1. `c69894b` - Modernize Python dependencies to 2025 standards
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2. `0f330d3` - Add R package setup script for separate R installation
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3. `bf5b5f4` - Migrate build system from conda to uv
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4. `edb7a82` - Migrate CI/CD from Travis CI to GitHub Actions
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5. `291f9f4` - Deprecate plotly authentication script
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6. `2497c2a` - Update documentation for modernized infrastructure
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7. `b7198f3` - Add migration and testing documentation
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8. `35f7c98` - Fix default make target for Netlify deployment
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9. `27b8428` - Add automatic dependency setup to Makefile
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10. `9d523fd` - Switch to uv sync for proper dependency management
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11. `a55cc38` - Fix seaborn API compatibility for 0.13+
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12. `7f31ca9` - Fix all seaborn and Altair compatibility issues
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13. `e7639cc` - Add Chrome installation for Kaleido v1 support
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## 🎯 Success Criteria
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- [x] Python 3.11 environment
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- [x] uv package manager
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- [x] All dependencies install automatically
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- [x] Notebook executes without errors
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- [x] R ggplot2 examples work
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- [x] plotly examples render to PNG
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- [x] seaborn examples work with 0.13+
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- [x] plotnine examples work with 0.15+
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- [ ] Altair examples render to PNG (pending)
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- [ ] Full site renders successfully
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- [ ] GitHub Actions CI passes
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- [ ] Netlify deployment works
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## 💡 Recommendations
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1. **Short-term**: Use `make qrender` with a pre-executed notebook that has working PNG outputs
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2. **Medium-term**: Fix Altair PNG rendering for complete automation
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3. **Long-term**: Consider adding more modern libraries (Polars, etc.)
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---
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**Modernization Duration**: ~2 hours
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**Libraries Updated**: 7 plotting libraries + 140+ dependencies
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**Breaking Changes Fixed**: 4 seaborn, 1 plotly, 1 altair
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**Infrastructure**: Fully modernized to 2025 standards

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