data-viz-renderer

Data Viz Renderer

Generate self-contained HTML/SVG infographics from JSON data. Four supported types:

1. Stats Cards — KPI big numbers + trend arrows + icons
2. Comparison Chart — Grouped bar chart with multiple series
3. Flow Diagram — Step-by-step process with numbering, icons, and connecting arrows
4. Dashboard — Mixed layout: stat cards + bar chart + donut chart + flow

Output is a fully self-contained HTML file (all CSS/SVG inline, no external dependencies), ready to open directly in a browser.

Usage

Basic Usage

python3 scripts/build_infographic.py config.json

Also supports reading from stdin:

cat config.json | python3 scripts/build_infographic.py

The script outputs a JSON status to stdout and writes the generated HTML to the path specified in the output field.

JSON Configuration Format

Common fields:

| Field | Type | Required | Description |

|-------|------|----------|-------------|

| title | string | No | Infographic title |

| subtitle | string | No | Subtitle |

| type | string | Yes | stats / comparison / flow / dashboard |

| palette | string | No | Color palette (default: auto) |

| data | object/array | Yes | Data content (format depends on type) |

| output | string | No | Output file path (default: infographic.html) |

| footer | string | No | Footer text |

Color Palettes

Available values: auto (automatically chosen based on data), ocean, sunset, forest, berry, vibrant, corporate, pastel, earth

Data Format by Type

1. stats — Stat Cards

{
  "type": "stats",
  "data": [
    {
      "label": "Total Revenue",
      "value": "$1.2M",
      "icon": "money",
      "trend": "+12.5%",
      "trend_dir": "up"
    },
    {
      "label": "Users",
      "value": "45,230",
      "icon": "users",
      "trend": "+8.2%",
      "trend_dir": "up"
    }
  ]
}

icon options: users, user, money, percent, globe, clock, check, star, target, zap, chart-bar, chart-pie, database, rocket, shield, heart, light, search, mail, settings, flag, trending-up, trending-down

trend_dir: up (green upward arrow) or down (red downward arrow)

2. comparison — Bar Chart Comparison

{
  "type": "comparison",
  "data": {
    "chart_title": "Quarterly Revenue Comparison",
    "categories": ["Q1", "Q2", "Q3", "Q4"],
    "series": [
      {"name": "2024", "values": [320, 410, 380, 520]},
      {"name": "2025", "values": [380, 490, 450, 610]}
    ]
  }
}

3. flow — Flow Diagram

{
  "type": "flow",
  "data": [
    {"step": 1, "title": "Requirements", "description": "Gather user needs", "icon": "search"},
    {"step": 2, "title": "Design", "description": "Create technical plan", "icon": "light"},
    {"step": 3, "title": "Development", "description": "Code and test", "icon": "settings"},
    {"step": 4, "title": "Launch", "description": "Deploy to production", "icon": "rocket"}
  ]
}

4. dashboard — Mixed Dashboard

{
  "type": "dashboard",
  "data": {
    "stats": [
      {"label": "DAU", "value": "12.3K", "icon": "users", "trend": "+5%", "trend_dir": "up"},
      {"label": "Conversion Rate", "value": "3.8%", "icon": "target", "trend": "-0.2%", "trend_dir": "down"}
    ],
    "chart": {
      "chart_title": "Monthly Trend",
      "categories": ["Jan", "Feb", "Mar", "Apr"],
      "series": [{"name": "DAU", "values": [10200, 11500, 11800, 12300]}]
    },
    "breakdown": [
      {"label": "iOS", "value": 45},
      {"label": "Android", "value": 38},
      {"label": "Web", "value": 17}
    ],
    "flow": [
      {"step": 1, "title": "Sign Up", "description": ""},
      {"step": 2, "title": "Activate", "description": ""},
      {"step": 3, "title": "Retain", "description": ""}
    ]
  }
}

Output Format

The script outputs a JSON result to stdout:

{
  "status": "success",
  "output": "/absolute/path/to/infographic.html",
  "type": "stats",
  "title": "My Infographic",
  "palette": "auto",
  "size_bytes": 8432
}

On error:

{
  "status": "error",
  "errors": ["Missing required field: data"]
}

Design Highlights

• Zero external dependencies: Pure Python standard library, no pip install needed
• Self-contained output: HTML with all CSS and SVG inline, no network required
• Responsive layout: Works on both desktop and mobile browsers
• Professional palettes: 8 preset color schemes + automatic selection
• 24+ built-in icons: Common SVG icons, no font files needed
• CJK-friendly: Font stack includes Noto Sans SC, PingFang SC, Microsoft YaHei

Use Cases

• Visualization modules in data reports
• Product data dashboards
• Business process illustrations
• Quarterly/monthly data comparisons
• Team KPI displays

Dependencies

• Python 3.7+ (standard library only)