import picobox


@picobox.pass_("conf")
def session(conf):
    class Session:
        connection = conf["connection"]

    return Session()


@picobox.pass_("session")
def compute(session):
    print(session.connection)


box = picobox.Box()
box.put("conf", {"connection": "sqlite://"})
box.put("session", factory=session)

with picobox.push(box):
    compute()