<s> from sqlalchemy import ( <EOL> Column , <EOL> Integer , <EOL> Text , <EOL> ) <EOL> from sqlalchemy . ext . declarative import declarative_base <EOL> from sqlalchemy . orm import ( <EOL> scoped_session , <EOL> sessionmaker , <EOL> ) <EOL> from zope . sqlalchemy import ZopeTransactionExtension <EOL> DBSession = scoped_session ( sessionmaker ( extension = ZopeTransactionExtension ( ) ) ) <EOL> Base = declarative_base ( ) <EOL> class TaskItem ( Base ) : <EOL> __tablename__ = '<STR_LIT>' <EOL> id = Column ( Integer , primary_key = True ) <EOL> task = Column ( Text , unique = True ) </s>
