text: from sqlalchemy import create_engine, MetaData
  from sqlalchemy.orm import scoped_session, sessionmaker
  from sqlalchemy.ext.declarative import declarative_base
  
  engine = create_engine('sqlite:////tmp/vortex_web.db', convert_unicode=True)
  db_session = scoped_session(sessionmaker(autocommit=False, autoflush=False, bind=engine))
  
  Base = declarative_base()
  Base.query = db_session.query_property()
  
  
  def init_db():
      import vortexwebserver.models
      Base.metadata.create_all(bind=engine)
  