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[pie-basic] matplotlib implementation #235
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
Status
- PR: feat(matplotlib): implement pie-basic #347
- File:
plots/matplotlib/pie/pie-basic/default.py - Workflow: 19995639840
- Imports:
🧪 Test Results (PR #347)
Python:
📊 Plot Preview (Python 3.13)
matplotlib (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 92/100 approve Criteria Checklist
- [N/A] VQ-001: Axes labeled correctly (pie charts don't have axes)
- [N/A] VQ-002: Grid is subtle (pie charts don't use grids)
- VQ-003: Elements clear - slices are distinct with good contrast
- VQ-004: No overlap - labels and percentages are well-positioned
- VQ-005: Legend present - legend available (configurable via parameter)
- VQ-006: Colorblind safe - uses distinguishable PyPlots palette (blue/yellow/red/green/violet)
- VQ-007: Image size - appropriate dimensions with bbox_inches='tight'
- VQ-008: Title - centered and clear
- CQ-001: Type hints present - all parameters and return type annotated
- CQ-002: Docstring complete - Google-style with Args, Returns, Raises, Example
- CQ-003: Input validation - checks empty data, missing columns, negative values, zero sum
- CQ-004: Clear error messages - includes available columns in KeyError
- CQ-005: No magic numbers - all values are configurable parameters with defaults
- CR-001: Data accurate - correctly uses category and value columns
- CR-002: Spec compliance - implements all required features (categories, values, proportions)
- CR-003: Edge cases - handles empty data, negative values, zero sum
Issues Found
None - implementation is high quality.
Minor Observations (not affecting score)
- The preview image shows labels on slices (legend disabled), while code defaults to legend=True. This is acceptable as both modes work correctly.
- Color palette includes red which could be problematic in red-green combinations, but green used is teal (#059669) which provides sufficient contrast.
Strengths
- Excellent input validation with informative error messages
- Comprehensive parameter support (explode, shadow, custom colors, legend positioning)
- Follows matplotlib library guidelines (uses ax.pie() not plt.pie())
- Clean, professional visual output
- Handles edge cases gracefully
AI Feedback for Next Attempt
No changes needed - implementation meets all quality criteria.
Verdict: APPROVED
- added a commit that references this issue
on Dec 7, 2025 Merged
matplotlib implementation for
pie-basichas been merged!
🚀 Auto-merged by pyplots CI
[pie-basic] matplotlib Implementation
Parent Issue: #206
Spec:
specs/pie-basic.mdLibrary: matplotlib
Feature Branch:
plot/pie-basicAttempt History
Attempts will be documented below as comments.