SQLAlchemy ORM template

orm.py

from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, String, Integer, Numeric
from sqlalchemy.orm import backref, relationship

Base = declarative_base()

class Thing(Base):
    __tablename__ = 'things'

    id = Column(Integer, primary_key=True)
    name = Column(String)

class Part(Base):
    __tablename__ = 'parts'

    id = Column(Integer, primary_key=True)
    name = Column(String)
    some_property = Column(Numeric)

    thing = relationship('Thing',
                         backref=backref('parts', cascade='all, delete-orphan'))

# ...

engine = # ... get dbengine
Base.metadata.create_all(engine)