code: def _loadDatabase(self, databaseLocation, stream=False):
          
  
          # Initialise Database
          self.systems = []
          self.binaries = []
          self.stars = []
          self.planets = []
  
          if stream:
              tree = ET.parse(databaseLocation)
              for system in tree.findall(".//system"):
                  self._loadSystem(system)
          else:
              databaseXML = glob.glob(os.path.join(databaseLocation, '*.xml'))
              if not len(databaseXML):
                  raise LoadDataBaseError('could not find the database xml files. Have you given the correct location '
                                          'to the open exoplanet catalogues /systems folder?')
  
              for filename in databaseXML:
                  try:
                      with open(filename, 'r') as f:
                          tree = ET.parse(f)
                  except ET.ParseError as e:  # this is sometimes raised rather than the root.tag system check
                      raise LoadDataBaseError(e)
  
                  root = tree.getroot()
  
                  # Process the system
                  if not root.tag == 'system':
                      raise LoadDataBaseError('file {0} does not contain a valid system - could be an error with your version'
                                              ' of the catalogue'.format(filename))
  
                  self._loadSystem(root)
docs: Loads the database from a given file path in the class
  
          :param databaseLocation: the location on disk or the stream object
          :param stream: if true treats the databaseLocation as a stream object