code: def getalgo(self, operation, name):
          '''Return the algorithm for *operation* named *name*'''
          if operation not in self._algorithms:
              raise NotAvailable('{0} not registered.'.format(operation))
          oper = self._algorithms[operation]
          try:
              return oper[name]
          except KeyError:
              raise NotAvailable('{0} algorithm {1} not registered.'
                                 .format(operation, name)f getalgo(self, operation, name):
          '''Return the algorithm for *operation* named *name*'''
          if operation not in self._algorithms:
              raise NotAvailable('{0} not registered.'.format(operation))
          oper = self._algorithms[operation]
          try:
              return oper[name]
          except KeyError:
              raise NotAvailable('{0} algorithm {1} not registered.'
                                 .format(operation, name))
docs: Return the algorithm for *operation* named *name*