def initialize(self, state, dict_):

        dict_[self.key] = None
        return None
Share a single subscription among multple observers.
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py/AttributeImpl.initialize--crossover with--dataset/ETHPy150Open ReactiveX/RxPY/rx/linq/observable/publish.py/share