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chore(altair): update quality score 91 and review feedback for facet-grid
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plots/facet-grid/implementations/python/altair.py

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"""anyplot.ai
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""" anyplot.ai
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facet-grid: Faceted Grid Plot
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Library: altair | Python 3.13
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Quality: pending | Created: 2026-05-13
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Library: altair 6.1.0 | Python 3.13.13
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Quality: 91/100 | Updated: 2026-05-13
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"""
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import os
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# Per-library metadata for altair implementation of facet-grid
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# Auto-generated by impl-generate.yml
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library: altair
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language: python
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specification_id: facet-grid
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created: '2025-12-30T16:30:41Z'
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updated: '2026-05-13T03:34:01Z'
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updated: '2026-05-13T03:36:57Z'
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generated_by: claude-haiku
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workflow_run: 25776543142
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issue: 2696
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preview_url_dark: https://storage.googleapis.com/anyplot-images/plots/facet-grid/python/altair/plot-dark.png
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preview_html_light: https://storage.googleapis.com/anyplot-images/plots/facet-grid/python/altair/plot-light.html
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preview_html_dark: https://storage.googleapis.com/anyplot-images/plots/facet-grid/python/altair/plot-dark.html
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quality_score: null
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quality_score: 91
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review:
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strengths: []
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weaknesses: []
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strengths:
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- 'Perfect visual quality: explicit font sizing, readable in both themes, no overlaps'
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- Proper Okabe-Ito palette with correct color ordering; theme-adaptive chrome flips
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correctly
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- Idiomatic Altair usage with .facet(), .encode(), and configure methods
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- Clean code structure and reproducible data generation
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- Faceted layout effectively demonstrates the plot type
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weaknesses:
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- 'Design Excellence is modest: well-configured defaults but lacks custom aesthetic
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sophistication'
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- 'Library Mastery could be deeper: doesn''t explore Altair-specific features like
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interactive selection'
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image_description: |-
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Light render (plot-light.png):
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Background: Warm off-white surface (#FAF8F1) — correct theme surface
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Chrome: Title "facet-grid · altair · anyplot.ai" is prominent and dark. Row headers (Sandy, Clay, Loam) and column headers (Spring, Summer, Fall) are well-sized and easily readable. Axes labeled "Water Usage (mm)" and "Yield (tons/ha)" with units. Tick labels clear. Legend frame with elevated background.
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Data: Three colors (teal #009E73, orange #D55E00, blue #0072B2) in Okabe-Ito order. Grid lines subtle (~10% opacity). Scatter markers clearly visible.
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Legibility verdict: PASS — all text readable against light background, no legibility issues.
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Dark render (plot-dark.png):
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Background: Warm near-black surface (#1A1A17) — correct dark theme surface
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Chrome: Title, headers, axis labels, and tick labels all rendered in light tones (INK=#F0EFE8, INK_SOFT=#B8B7B0) and fully readable. Legend frame uses dark elevated background (#242420) with light text.
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Data: Colors identical to light render—teal, orange, blue in identical positions. Only chrome differs (background and text colors adapt; data stays the same).
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Legibility verdict: PASS — all text readable against dark background, no dark-on-dark failures. Brand green #009E73 visible and clear.
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criteria_checklist:
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visual_quality:
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score: 30
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max: 30
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items:
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- id: VQ-01
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name: Text Legibility
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score: 8
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max: 8
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passed: true
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comment: All font sizes explicitly set and readable in both themes
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- id: VQ-02
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name: No Overlap
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score: 6
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max: 6
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passed: true
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comment: No overlapping text elements
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- id: VQ-03
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name: Element Visibility
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score: 6
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max: 6
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passed: true
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comment: Markers well-adapted to 540-point data density
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- id: VQ-04
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name: Color Accessibility
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score: 2
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max: 2
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passed: true
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comment: CVD-safe Okabe-Ito colors with good contrast
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- id: VQ-05
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name: Layout & Canvas
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score: 4
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max: 4
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passed: true
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comment: Good proportions, balanced margins, legend well-positioned
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- id: VQ-06
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name: Axis Labels & Title
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score: 2
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max: 2
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passed: true
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comment: Both axes labeled with units
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- id: VQ-07
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name: Palette Compliance
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score: 2
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max: 2
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passed: true
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comment: 'First series #009E73, correct theme chrome, data colors identical
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across themes'
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design_excellence:
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score: 13
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max: 20
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items:
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- id: DE-01
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name: Aesthetic Sophistication
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score: 4
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max: 8
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passed: false
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comment: Well-configured defaults, lacks custom design thought
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- id: DE-02
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name: Visual Refinement
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score: 5
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max: 6
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passed: true
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comment: Subtle grid, explicit sizing, generous whitespace
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- id: DE-03
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name: Data Storytelling
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score: 4
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max: 6
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passed: false
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comment: Faceting creates hierarchy but no explicit visual emphasis
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spec_compliance:
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score: 15
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max: 15
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items:
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- id: SC-01
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name: Plot Type
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score: 5
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max: 5
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passed: true
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comment: Correct faceted grid with scatter plots
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- id: SC-02
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name: Required Features
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score: 4
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max: 4
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passed: true
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comment: All spec features present
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- id: SC-03
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name: Data Mapping
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score: 3
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max: 3
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passed: true
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comment: Axes and encodings correctly assigned
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- id: SC-04
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name: Title & Legend
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score: 3
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max: 3
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passed: true
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comment: Title format correct, legend labels match
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data_quality:
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score: 15
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max: 15
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items:
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- id: DQ-01
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name: Feature Coverage
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score: 6
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max: 6
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passed: true
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comment: Shows variation across all dimensions
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- id: DQ-02
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name: Realistic Context
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score: 5
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max: 5
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passed: true
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comment: Realistic agricultural scenario
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- id: DQ-03
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name: Appropriate Scale
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score: 4
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max: 4
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passed: true
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comment: Plausible values for domain
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code_quality:
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score: 10
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max: 10
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items:
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- id: CQ-01
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name: KISS Structure
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score: 3
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max: 3
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passed: true
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comment: Linear structure, no functions/classes
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- id: CQ-02
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name: Reproducibility
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score: 2
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max: 2
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passed: true
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comment: Seed set to 42
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- id: CQ-03
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name: Clean Imports
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score: 2
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max: 2
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passed: true
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comment: Only necessary imports
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- id: CQ-04
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name: Code Elegance
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score: 2
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max: 2
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passed: true
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comment: Clean, Pythonic, no fake functionality
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- id: CQ-05
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name: Output & API
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score: 1
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max: 1
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passed: true
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comment: Correct file output format
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library_mastery:
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score: 8
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max: 10
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items:
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- id: LM-01
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name: Idiomatic Usage
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score: 5
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max: 5
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passed: true
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comment: Uses .facet(), .encode(), configure methods appropriately
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- id: LM-02
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name: Distinctive Features
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score: 3
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max: 5
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passed: false
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comment: Uses faceting but could explore selections or cross-filtering
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verdict: APPROVED
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impl_tags:
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dependencies: []
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techniques:
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- faceting
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- hover-tooltips
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patterns:
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- data-generation
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dataprep: []
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styling: []

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