def now(cls, tz=None):
        t = _time.time()
        return cls.fromtimestamp(t, tz)
expect is a list of tuples: (event, {key:value, key1:value1, ..})
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/datetime.py/datetime.now--crossover with--dataset/ETHPy150Open meejah/txtorcon/test/test_torstate.py/StreamListener.__init__