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[pie-basic] plotnine implementation #270
Description
Activity
- added a parent issue
on Dec 6, 2025 Attempt 1/3
Technical Approach
- Imports:
import matplotlib.pyplot as plt, import pandas as pd - Config: figsize=16, 9, color=white
Status
- PR: feat(plotnine): implement pie-basic #370
- File:
plots/plotnine/pie/pie-basic/default.py - Workflow: 19995639840
- Imports:
🧪 Test Results (PR #370)
Python:
📊 Plot Preview (Python 3.13)
plotnine (default) - UPDATE
Before After View version history (3 versions)
🤖 Generated by gen-preview workflow
AI Review - Attempt 1/3
Quality Evaluation
Evaluator Score Verdict Claude 78/100 reject Criteria Checklist
- [N/A] VQ-001: Axes labeled correctly - Pie charts don't have axes
- VQ-002: Visual clarity - Clean, elements distinguishable
- VQ-003: Elements clear - Slices and percentages clearly visible
- VQ-004: No overlap - Legend, labels, text all readable
- VQ-005: Legend present - Yes, with category names
- VQ-006: Colorblind safe - Uses distinct colors, no red-green adjacent
- VQ-007: Image size - Appropriate figure size
- VQ-008: Title - Present and centered
- CQ-001: Type hints present - All parameters typed
- CQ-002: Docstring - Complete Google-style with Args, Returns, Raises, Example
- CQ-003: Input validation - Thorough validation for all edge cases
- CQ-004: Clear error messages - Includes available columns in errors
- CQ-005: No magic numbers - All values parameterized
- CR-001: Data accurate - Correct data representation
- CR-002: Spec compliance - Matches spec requirements
- CR-003: Edge cases - Handles empty data, negatives, zero totals
Issues Found
-
CRITICAL: Not a plotnine implementation - The code uses matplotlib directly (
matplotlib.pyplot) instead of plotnine's grammar of graphics. While the code correctly notes that plotnine doesn't supportcoord_polar(), this means the implementation doesn't actually demonstrate plotnine's capabilities. -
Library misrepresentation - The file is in
plots/plotnine/but imports and usesmatplotlib.pyplotfor all rendering. This violates the core principle that each library folder should contain implementations using that specific library.
AI Feedback for Next Attempt
Option 1 (Recommended): Mark this spec as
not-feasiblefor plotnine since the library genuinely lackscoord_polar()support needed for pie charts. This is the honest approach.Option 2: If we want a plotnine file, implement a workaround using stacked bar chart with
coord_flip()that resembles a horizontal bar chart showing proportions (not a true pie but uses actual plotnine). However, this wouldn't match the spec for a "pie chart".The current approach of putting matplotlib code in the plotnine folder is misleading to users who want to learn how to create pie charts with plotnine.
Verdict: REJECTED
The implementation is technically excellent matplotlib code with proper validation and documentation, but it does not use plotnine at all. A plotnine implementation folder should contain plotnine code. Since plotnine lacks the capability to create pie charts, this spec should be marked as not-feasible for this library rather than including matplotlib code disguised as plotnine.
- added a commit that references this issue
on Dec 7, 2025 Merged
plotnine implementation for
pie-basichas been merged!
🚀 Auto-merged by pyplots CI
[pie-basic] plotnine Implementation
Parent Issue: #206
Spec:
specs/pie-basic.mdLibrary: plotnine
Feature Branch:
plot/pie-basicAttempt History
Attempts will be documented below as comments.