“cmd.load” can by used to read molecules, crystallographic maps and other volumetric data, PyMOL sessions, and some other types of content.
cmd.load(string filename, string object-name, integer state, string format, int finish, int discrete, int quiet, int multiplex, int zoom, int partial)
def load(filename, object='', state=0, format='', finish=1, discrete=-1, quiet=1, multiplex=None, zoom=-1, partial=0):