Eunoia

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Python bindings for the Eunoia, a Rust library for fitting area-proportional Euler and Venn diagrams. Sister package to the R package eulerr.

Euler circles, ellipses, and a Venn diagram fitted with Eunoia

Install

pip install eunoia

Quickstart

import eunoia as eu
import matplotlib.pyplot as plt

# Disjoint (per-region) input is the default.
fit = eu.euler({"A": 10, "B": 5, "A&B": 3})
print(fit)
# EulerFit (2 circles, diag_error=2.776e-17, stress=5.887e-33, loss=5.887e-33)
#                  original      fitted    residual regionError
#   A                    10          10           0           0
#   B                     5           5           0           0
#   A&B                   3           3   8.882e-16   2.776e-17

fit.plot()
plt.show()

euler() also accepts inclusive counts, DataFrames, and NumPy arrays; shape= switches between circles, ellipses, squares, and rectangles; venn() draws topological diagrams; plot(glyphs=True) adds one countable dot per unit; plot(members={"mode": "packed"}) packs retained member names into their regions; and eunoia.options(...) sets global plotting defaults. See the documentation for the full API.

Documentation

Full documentation, including narrative guides and the API reference, lives at jolars.github.io/eunoia-py.

Ecosystem

This package is the Python member of the Eunoia family. The same Rust core powers bindings in several other languages:

Language Package Install
Rust eunoia (repo) cargo add eunoia
JavaScript @jolars/eunoia (repo) npm install @jolars/eunoia
Julia Eunoia.jl (repo) ] add Eunoia
R eulerr (repo) install.packages("eulerr")

Documentation for the whole family lives at eunoia.bz/docs/; the Rust API reference is at docs.rs/eunoia.

License

MIT

Project links

Data verified by PyPI on Aug 21, 2026
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Latest release

1 maintainer

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Avatar for jolars from gravatar.com jolars

Credits

Author: Johan Larsson

GitHub Statistics

Data verified by PyPI on Aug 21, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License (MIT)

Requires

Python >=3.11

Provides Extra

docs plotly

Tags

euler venn diagram visualization set

Classifiers

Report project as malware

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