mpl-richtext 0.1.5

Rich text rendering for Matplotlib with multi-color and multi-style support

mpl-richtext

Rich text rendering for Matplotlib - Create beautiful multi-color, multi-style text in a single line.

Why mpl-richtext?

Standard Matplotlib only supports single-color text. To create multi-colored text, you need to manually position each piece and calculate spacing - tedious and error-prone!

mpl-richtext solves this by letting you specify colors and styles for each text segment in one simple function call.

Installation

pip install mpl-richtext

Quick Start

import matplotlib.pyplot as plt
from mpl_richtext import richtext

fig, ax = plt.subplots()

# Create multi-colored text in one line!
richtext(0.5, 0.5, 
         strings=["hello", ", ", "world"],
         colors=["red", "blue", "green"],
         ax=ax, fontsize=20, transform=ax.transAxes)

plt.show()

Features

✨ Multi-color text - Different colors for each word or character
🎨 Multi-style text - Mix font sizes, weights, families, and styles (italic/oblique)
📦 Flexible input - Lists, dicts, or tuples for colors and properties
📏 Auto word-wrapping - Specify box_width for automatic text wrapping
🎯 Full alignment - Left, center, right horizontal and vertical alignment
✨ Decorations - Support for underlines and background colors
🔄 Transformations - Support for text rotation
👻 Transparency - Support for alpha values per segment
⚡ Easy to use - Simple API, works with any Matplotlib axes

API Reference

richtext(x, y, strings, colors=None, ax=None, **kwargs)

Parameters:

• x, y : float
  Starting position of the text

• strings : list of str
  List of text segments, e.g., ["hello", ", ", "world"]

• colors : str, list, or dict, optional
  Colors for each segment. Can be:

  • Single string: "red" (applies to all)
  • List: ["red", "blue", "green"] (one per segment)
  • Dict: {0: "red", 2: "green"} (specific indices)
  • Tuple keys: {(0, 2): "red"} (multiple indices same color)

• ax : matplotlib.axes.Axes, optional
  Axes to draw on. If None, uses current axes.

• kwargs : Additional properties

  • Global: box_width, linespacing, ha, va, transform, zorder
  • Per-segment: fontsize/fontsizes, fontweight/fontweights, fontfamily/fontfamilies, etc.
  • Any property can be:
    • Single value (applies to all)
    • List (one per segment, auto-extends)
    • Dict (specific indices)

Returns:

• list of Text - List of created matplotlib Text objects

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Links

• PyPI: https://pypi.org/project/mpl-richtext/
• GitHub: https://github.com/ra8in/mpl-richtext
• Issues: https://github.com/ra8in/mpl-richtext/issues

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Made with ❤️ for the Matplotlib community