def itermerged(self):
        for key in self:
            val = self._container[key.lower()]
            yield val[0], ', '.join(val[1:])
Initialize the given state's attribute with an empty value.
dataset/ETHPy150Open sigmavirus24/betamax/betamax/headers.py/HTTPHeaderDict.itermerged--crossover with--dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/orm/attributes.py/AttributeImpl.initialize