code: def _parse_vrf(self, config):
          
          match = re.search(r'^router ospf \d+ vrf (\w+)', config)
          if match:
              return dict(vrf=match.group(1))
          return dict(vrf='default')
docs: Parses config file for the OSPF vrf name
  
             Args:
                 config(str):  Running configuration
             Returns:
                 dict: key: ospf_vrf (str)