IOData is a HORTON 3 module for input/output of quantum chemistry file formats. Documentation is here: https://iodata.readthedocs.io/en/latest/index.html

Please use the following citation in any publication using IOData library:

"IOData: A python library for reading, writing, and converting computational chemistry file formats and generating input files.", T. Verstraelen, W. Adams, L. Pujal, A. Tehrani, B. D. Kelly, L. Macaya, F. Meng, M. Richer, R. Hernandez‐Esparza, X. D. Yang, M. Chan, T. D. Kim, M. Cools‐Ceuppens, V. Chuiko, E. Vohringer‐Martinez,P. W. Ayers, F. Heidar‐Zadeh, J Comput Chem. 2021; 42: 458– 464.

In anticipation of the 1.0 release of IOData, install the latest git revision as follows:

python -m pip install git+https://github.com/theochem/iodata.git

Add the --user argument if you are not working in a virtual or conda environment. Note that there may be API changes between subsequent revisions.

See https://iodata.readthedocs.io/en/latest/install.html for full details.