Extend SQL Alchemy's Base to avoid multiple inherritance

extend_base.py

from sqlalchemy.ext.declarative import declarative_base, declared_attr
from sqlalchemy import Column, Integer, String

Base = declarative_base()

class CustomBase(Base):
    __abstract__ = True

    def __init__(self):
        print "Hello world"

    @declared_attr
    def __tablename__(cls):
        return cls.__name__.lower()

class Person(CustomBase):
    __tablename__ = 'orang'
    id = Column(Integer, primary_key=True)
    nama = Column(String)

if __name__ == '__main__':
    person = Person()
    person.nama = 'Tono'
    print person.__tablename__
    print person.nama