WIP: API for factory_boy / SQLAlchemy's session

my_factory.py

import factory
import factory.alchemy

import my_tests
import my_models

class MyFactory(factory.alchemy.SQLAlchemyFactory):
    class Meta:
        sqlalchemy_session_loader = my_tests.session_loader
        model = my_models.Model

my_tests.py

import factory.alchemy

session_loader = factory.alchemy.SQLAlchemySessionLoader()

runtests.py

import my_tests


class MyRunner():
    def prepare(self):
         self.session = make_an_alchemy_session()
         my_tests.session_loader.set_session(self.session)