SQLAlchemyのclassを動的に作成する。

gistfile1.py

classname = 'NewClass'
tablename = 'table'
session = scoped_session(sessionmaker(bind=engine))

classobj = Base._decl_class_registry.get(classname)
if classobj:
    session.bind_table(classobj.__table__, engine)
    return classobj
if tablename in Base.metadata.tables.keys():
    Base.metadata.remove(Base.metadata.tables[tablename])
attrs = {'__tablename__': tablename}
 NewClass = type(classname,
                 (NewTableSchema, Base), attrs)
session.bind_table(NewTableSchem.__table__, engine)