.. -*- coding: utf-8 -*- .. _topology-label: ===================== The topology system ===================== As shown briefly in :ref:`overview-label`, the :class:`~MDAnalysis.core.universe.Universe` class is the primary object and core interface to molecular dynamics data in MDAnalysis. When loading topology information from a file, as with :: >>> from MDAnalysis import Universe >>> from MDAnalysis.tests.datafiles import PSF >>> u = Universe(PSF) the file is read, the contents parsed, and a :class:`~MDAnalysis.core.topology.Topology` object is constructed from these contents.