VASPs POSCAR/CONTCAR file does not contain any direct information about the cell symmetry. If I run for example a calculation on simple TiN in space group 225, this symmetry is (should be) preserved. In other cases this is not so clear, so I would like to have a tool to extract the space group from a given structure file. A google search turned up a post on the VASP forum with the same question, but only unsatisfying answers - a commercial software package (Material Studio) and a now defunct link.
VESTA can impose a certain symmetry on a structure, but that is for entering lattice parameters, not for detecting present symmetry.
So I am asking now what simple, freely available tool can give me that information, preferably as a python package or similar.