code: def get_godag(fin_obo="go-basic.obo", prt=sys.stdout, loading_bar=True, optional_attrs=None):
      
      from goatools.obo_parser import GODag
      download_go_basic_obo(fin_obo, prt, loading_bar)
      return GODag(fin_obo, optional_attrs, load_obsolete=False, prt=prt)
docs: Return GODag object. Initialize, if necessary.