icplot
icplot makes plots, diagrams and images for technical documents at
ICHEC. It converts between image formats, renders
text-based diagrams to images and applies a shared theme.
It also draws the branded diagrams in our READMEs and handbooks. The 3D mesh and OpenFOAM code is now in icmesh.
Install
pip install icplot
The core install is small. Add the extras for the backends you need:
| Extra | Installs | For |
|---|---|---|
cairo |
CairoSVG | SVG to PNG or PDF, and drawing scenes |
imagemagick |
wand | PDF to PNG |
plot |
matplotlib | plots and charts |
video |
moviepy | videos |
all |
all of these | everything |
For example, pip install "icplot[cairo]". The cairo and imagemagick
extras also need the system libraries. On a Mac:
brew install imagemagick cairo
Convert an image
icplot convert --source my_image.svg --target my_image.png
icplot converts SVG to PNG or PDF, and PDF to PNG.
Render a diagram
icplot render uml_diagram.puml
This renders the PlantUML file to PNG and SVG. icplot also renders LaTeX and
TikZ, and Mermaid. It renders its own JSON formats for plots, trees, Gantt
charts and scenes.
Render a folder of diagrams
Give icplot render a directory to render every diagram in it:
icplot render .
It reads render.yaml from the current directory, or the file you give with
--config. For example:
tex:
templates:
- styles
- templates
build_engine: dvisvgm
plantuml:
config_path: styles/puml-theme-platform.puml
excludes:
- styles
- templates
tex.templates adds directories to the TeX search path, so a diagram can load
the TikZ libraries in them. build_engine: dvisvgm renders TikZ straight to
SVG. plantuml.config_path applies a PlantUML theme to every diagram.
excludes lists directories not to render.
For reusable TikZ libraries, see templates/tikz.
Draw a branded diagram
icplot.diagram draws SVG diagrams in the ICHEC brand, such as the feature
maps and deployment flows in our READMEs and handbook. A diagram is a short
Python script that builds a Diagram and saves it. The SVG embeds its font, so
it looks the same in a browser, a GitLab README and a PDF.
from pathlib import Path
from icplot.diagram import BLUE, Diagram
d = Diagram(600, 300, "Example", "What the diagram shows, for screen readers")
d.card(24, 24, 220, 90)
d.icon("users", 40, 40)
d.text(72, 56, "Your users", 16, 700)
d.arrow([(244, 69), (340, 69)], BLUE)
d.logo(576, 240)
d.save(Path("example.svg"))
Keep a diagram's script beside its SVG, and commit both. Icons come from
Lucide and Simple Icons. Add
one with uv run scripts/vendor_icons.py lucide:<name> or
simple-icons:<name>.
Theme a diagram
The theme follows Material 3. ref tokens hold the raw colours, sizes and
fonts. sys tokens name what each is for, such as sys.color.outline, and
point at ref tokens.
To make the theme files, run:
icplot theme generate --output_dir styles/
This writes a TikZ library, tikzlibraryplatform.code.tex, and a PlantUML
theme, puml-theme-platform.puml. Don't edit them by hand. To change the
theme, copy theme.json from the package source, change it and pass it with
--theme.
To change one colour in one diagram, set it in that diagram. In TikZ, use
\platformthemeset{accent=FF5500}. In PlantUML, add a skinparam after
@startuml.
Don't theme colours that carry meaning in a notation, such as ArchiMate's layer colours.
Licence
Copyright 2026 Irish Centre for High End Computing. MIT licence, see
LICENSE.
1 maintainer
Metadata
1 maintainer
Release files for icplot 0.8.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| icplot-0.8.0.tar.gz | 141.6 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| icplot-0.8.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 342.7 kB
Release files / icplot-0.8.0.tar.gz
| Download URL | icplot-0.8.0.tar.gz |
|---|---|
| Size | 141.6 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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No |
| Uploaded via |
twine/7.0.0 CPython/3.14.7
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Release files / icplot-0.8.0-py3-none-any.whl
| Download URL | icplot-0.8.0-py3-none-any.whl |
|---|---|
| Size | 201.1 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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No |
| Uploaded via |
twine/7.0.0 CPython/3.14.7
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