def add(self, key, value, timeout=None, version=None):
        raise NotImplementedError
A signal handler that gets called in response to
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/core/cache/backends/base.py/BaseCache.add--crossover with--dataset/ETHPy150Open pika/pika/tests/unit/select_connection_ioloop_tests.py/IOLoopEintrTestCaseSelect.signal_handler