def test_build_event(self):
        evt = event.build_event("evt_name", arg1="val1", arg2=None)
        assert evt.name == "evt_name"
        assert evt.args == {'arg1': "val1", 'arg2': None}
def pop(self, key, default=None):
        value = self._collection.pop(key, default)
        return self._to_python(value)