title: The CosmoAI project

The CosmoSim software

This project provides a simulator for gravitational lensing based on Chris Clarkson's Roulettes framework. The code is experimental, and intended for research, with many loose ends. If you think it may be useful, we shall be happy to discuss collaboration and help you get started.

The core team is

Documentation is on the web site, The notes below is just a brief synopsis.

Installation Guide

CosmoSim is set up to build python packages (wheels) that can be installed with pip.

pip install CosmoSim

You can check the version installed with

python -m CosmoSim --version

Local build

We successfully build CosmoSim for Linux/x86_64, MacOS/arm, and Windows/amd64, for python 3.11 through 3.14 (the free-threaded 3.14t build is available on Linux and macOS).

To build locally from source, you can run (from the root of the repo),

pip install build
python -m build

This is highly dependent on the local configuration, and may fail for a number of reasons. If it succeeds, the binary file for the python module appears under src/CosmoSim.

If you can build, pip can also install the package from the working directory. Again, from the root of the repo,

pip install .

For non-standard building, see BUILD.md.

Running the GUI

python3 -m CosmoSim.GUI

The GUI tool is hopefully quite self-explanatory.
The images shown are the actual source on the left and the distorted (lensed) image on the right.

The Command Line Interface (CLI)

An illustrative test set can be generated by the following command.

mkdir images
python3 -m CosmoSim -CR -Z 400 --csvfile Datasets/dataset.csv --directory images

This generates a range of images in the newly created images directory.

The flags may be changed; -C centres det distorted image in the centre of the image (being debugged); -Z sets the image size; -R prints an axes cross.

Further documentation and examples are found on the web site,

Versions

  • The imortant git branches are
    • develop is the current state of the art
    • master should be the last stable version
  • Releases
    • v-test-* are test releases, used to debug workflows. Please ignore.
    • see the releases on github and CHANGELOG.md

Project links

Data verified by PyPI on Jul 18, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

PyPI data
Data sourced directly from PyPI's database.
  • Released:
Newer release available (3.3.0)

1 maintainer

PyPI data
Data sourced directly from PyPI's database.
Avatar for hgeorgsch from gravatar.com hgeorgsch

Credits

Author: Hans Georg Schaathun et al

GitHub Statistics

Data verified by PyPI on Jul 18, 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 expression

MIT
View SPDX License List

Requires

Python >=3.11

Tags

cosmology gravitational lensing simulation

Classifiers

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3.3.0

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3.0.3

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