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We are very happy to announce the release of the 0.9 version of Chemfiles. Chemfiles is a C++ library providing write and read access to chemistry file formats. Chemfiles also has bindings to other languages and can be used from C, Fortran, Python, Julia and Rust.
It can be installed using Conda
conda install -c conda-forge chemfiles
There are other libraries for file conversion in particular OpenBabel a C++ library providing conversions between more than 110 formats.