code: def list_relations(self):
          ''' list every relation in the database as (src, relation, dst) '''
          _ = self._execute('select * from relations').fetchall()
          for i in _:
              #print(i)
              src, name, dst = i
              src = self.deserialize(
                  next(self._execute('select code from objects where id=?',(src,)))[0]
              )
              dst = self.deserialize(
                  next(self._execute('select code from objects where id=?',(dst,)))[0]
              )
              yield src, name, dsf list_relations(self):
          ''' list every relation in the database as (src, relation, dst) '''
          _ = self._execute('select * from relations').fetchall()
          for i in _:
              #print(i)
              src, name, dst = i
              src = self.deserialize(
                  next(self._execute('select code from objects where id=?',(src,)))[0]
              )
              dst = self.deserialize(
                  next(self._execute('select code from objects where id=?',(dst,)))[0]
              )
              yield src, name, dst
docs: list every relation in the database as (src, relation, dst)