“cmd.fetch” downloads a file from the internet (if possible)
cmd.fetch(string code, string name, int state, init finish, int discrete, int multiplex, int zoom, string type, int async, string path, string file, int quiet)
def fetch(code, name='', state=0, finish=1, discrete=-1, multiplex=-2, zoom=-1, type='pdb', async=-1, path=None, file=None, quiet=1):