def _get_from_read_queue(self):
        try:
            frame_value = self._read_queue.get(False)
        except Queue.Empty:
            return None

        try:
            self._read_queue.task_done()
        except ValueError:
            pass
        return frame_value
Digraph equality test. This one checks edge equality.
dataset/ETHPy150Open gmr/rabbitpy/rabbitpy/channel.py/Channel._get_from_read_queue--crossover with--dataset/ETHPy150Open pmatiello/python-graph/tests/unittests-digraph.py/test_digraph.test_digraph_equality_edges