def __init__(self):
        self.data = None
:param ell: the initial number of vertices.
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/sensor/speedtest.py/SpeedtestData.__init__--crossover with--dataset/ETHPy150Open charanpald/APGL/apgl/generator/BarabasiAlbertGenerator.py/BarabasiAlbertGenerator.setEll