Installation

EROTICA requires Python ≥ 3.13. This is requires-python in pyproject.toml, and it is what CI runs (3.13 and 3.14) — an older version cannot install the package at all, so the “≥ 3.11” this page used to state was not a soft floor but a wrong one.

pip install erotica

Or from source:

git clone https://github.com/notluquis/erotica
cd erotica
pip install -e .

Optional extras

The core install pulls only what clustering needs. Heavier or task-specific stacks are opt-in:

Extra	Adds	For
bayes	PyMC, ArviZ, blackjax	Bayesian isochrone / membership fitting
selection	gaiaunlimited, selection functions	completeness-aware work
examples	Jupyter, seaborn	running the example notebooks
docs	Sphinx + pydata theme	building this documentation
dev	pytest, pytest-cov, ruff, mypy, pre-commit, nbstripout	contributing

pip install "erotica[bayes]"

The dev extra ships ruff, which replaced black + isort + flake8; it is what .pre-commit-config.yaml runs and therefore what gates a commit. This table named black until 2026-08-04, so anyone following it installed the dev extra and then ran a formatter that was not there.