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[box-basic] pygal implementation #332
Description
Activity
- added a parent issue
on Dec 7, 2025 Attempt 1/3
Technical Approach
- Imports:
import numpy as np, import pygal, from pygal.style import Style - Plot function:
pygal.Box
Status
- PR: feat(pygal): implement box-basic #443
- File:
plots/pygal/box/box-basic/default.py - Workflow: 20002523464
- Imports:
🧪 Test Results (PR #443)
Python:
📊 Plot Preview (Python 3.13)
pygal (default) - UPDATE
Before After View version history (6 versions)
🤖 Generated by gen-preview workflow
AI Review - Attempt 1/3
Quality Evaluation
Evaluator Score Verdict Claude 88/100 approve Criteria Checklist
Visual Quality:
- VQ-001: Axes labeled correctly - Y-axis shows "Value", X-axis shows "Group"
- VQ-002: Visual clarity - Grid is subtle (dashed lines), doesn't dominate data
- VQ-003: Elements clear - Box plots are clearly visible with good contrast
- VQ-004: No overlap - Labels, legend, and boxes don't overlap
- VQ-005: Legend present - Legend shows all 4 groups clearly at bottom
- VQ-006: Colorblind safe - Uses pastel colors (blue, yellow, pink, green) - accessible palette
- VQ-007: Image size - Default 1600x900 instead of spec target 4800x2700
- VQ-008: Title present - "Distribution Comparison Across Groups" displayed clearly
Code Quality:
- CQ-001: Type hints present - All function parameters and return type annotated
- CQ-002: Docstring complete - Google-style with Args, Returns, Raises, Example
- CQ-003: Input validation - Checks for empty data and missing columns
- CQ-004: Clear error messages - Includes available columns in error message
- CQ-005: No magic numbers - Some hardcoded values (e.g., opacity=0.7) without named constants
Correctness:
- CR-001: Data accurate - Uses correct columns (values, groups) with proper handling
- CR-002: Spec compliance - Implements box plot with quartiles, whiskers (Tukey 1.5×IQR), shows outliers
- CR-003: Edge cases - Handles empty data and missing columns with proper errors
Issues Found
- VQ-007 PARTIAL: Default width/height (1600x900) doesn't match the target 4800x2700 specified in pygal.md. However, these are configurable parameters and the 16:9 ratio is correct.
- CQ-005 PARTIAL: Some magic numbers like opacity values (0.7, 0.9) could be named constants, though they're common styling defaults.
Strengths
- Excellent docstring with complete Args, Returns, Raises, and Example sections
- Robust input validation with helpful error messages listing available columns
- Uses Tukey method for whiskers (correct 1.5×IQR behavior per spec)
- Clean colorblind-safe color palette
- Good use of TYPE_CHECKING for type hints without runtime overhead
- Legend shows sample size (n=X) for each group - useful metadata
AI Feedback for Next Attempt
Consider using 4800x2700 as default dimensions to match the style guide specification.
Minor: Could define OPACITY_DEFAULT = 0.7 as a constant.Verdict: APPROVED
The implementation correctly creates box plots comparing statistical distributions across groups. It properly shows quartiles, whiskers extending to 1.5×IQR, and handles the data accurately. The code quality is high with comprehensive type hints, validation, and documentation. The visual output is clean and colorblind accessible.
- added a commit that references this issue
on Dec 7, 2025 Merged
pygal implementation for
box-basichas been merged!
🚀 Auto-merged by pyplots CI
[box-basic] pygal Implementation
Parent Issue: #203
Spec:
specs/box-basic.mdLibrary: pygal
Feature Branch:
plot/box-basicAttempt History
Attempts will be documented below as comments.