Gemmi

Gemmi is a C++ library with comprehensive Python bindings designed for structural biology, particularly macromolecular crystallography. It provides tools for working with various file formats like mmCIF, PDB, MTZ, MRC/CCP4, and general CIF/STAR files, handling macromolecular models, refinement restraints, reflection data, and crystallographic symmetry. Currently at version 0.7.5, it is an actively developed open-source project maintained by CCP4 and Global Phasing Ltd.