@abc.abstractmethod
    def __len__(self):
        raise NotImplementedError()
Start the receive thread
dataset/ETHPy150Open gbeced/pyalgotrade/pyalgotrade/dataseries/__init__.py/DataSeries.__len__--crossover with--dataset/ETHPy150Open mne-tools/mne-python/mne/realtime/client.py/RtClient.start_receive_thread