Metadata-Version: 2.4
Name: pysisyphus
Version: 1.0.0
Summary: Python suite for exploring potential energy surfaces.
Home-page: https://github.com/eljost/pysisyphus
Maintainer: Johannes Steinmetzer
Maintainer-email: johannes.steinmetzer@uni-jena.de
License: GNU General Public License v3 (GPLv3)
Platform: unix
Classifier: License :: OSI Approved :: GNU General Public License v3 (GPLv3)
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<p align="center">
    <img src="resources/logo_new_cut_small.png" alt="pysisyphus logo" />
</p>

[![Documentation Status](https://readthedocs.org/projects/pysisyphus/badge/?version=master)](https://pysisyphus.readthedocs.io/en/master/?badge=master)
[![build](https://github.com/eljost/pysisyphus/workflows/Python%20application/badge.svg)](https://github.com/eljost/pysisyphus/actions)
[![codecov](https://codecov.io/gh/eljost/pysisyphus/branch/master/graph/badge.svg)](https://codecov.io/gh/eljost/pysisyphus)
[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
[![DOI](https://zenodo.org/badge/96281078.svg)](https://zenodo.org/badge/latestdoi/96281078)
[![built with nix](https://builtwithnix.org/badge.svg)](https://builtwithnix.org)

**As of November 2024 I'm no longer in academia. I've no longer access to commerical/closed-source codes like Gaussian or Turbomole, nor to paywalled scientific papers. Consider pysisyphus to be unmaintained.**

**Use at your own risk.**

`pysisyphus` is a software-suite for the exploration of potential energy surfaces in ground- 
and **excited states**. It implements several methods to search for stationary points
(minima and first order saddle points) and the calculation of minimum energy paths by means
of IRC and Chain of States methods like Nudged Elastic Band and Growing String.

Furthermore it provides tools to easily analyze & modify geometries (aligning, translating, **interpolating**, ...) and to visualize the calculation results.

Required energies, gradients and hessians are calculated by calling external quantum chemistry codes. Alternatively `pysisyphus` can also be used as a library to implement custom quantum chemistry workflows.

**Further information can be found in the Open Access [pysisyphus paper](https://onlinelibrary.wiley.com/doi/full/10.1002/qua.26390).**

## Documentation

Please have a look at the [documentation](https://pysisyphus.readthedocs.io/en/dev/).

## Example

Fully internal coordinate transition state search for the famous alanine dipeptide isomerization reaction, using the xtb calculator and the growing string method.

[![asciicast](https://asciinema.org/a/300731.svg)](https://asciinema.org/a/300731)


## Contribute

If any problems arise, please open an issue and I'll see if I can help **if my time permits it**. Contributions are welcome, so feel free to submit a PR.
