'Initialize the data object.'

def __init__(self, api_key, latitude, longitude, units, interval):

    self._api_key = api_key
    self.latitude = latitude
    self.longitude = longitude
    self.units = units
    self.data = None
    self.unit_system = None
    self.data_currently = None
    self.data_minutely = None
    self.data_hourly = None
    self.data_daily = None
    self.update = Throttle(interval)(self._update)
    self.update_currently = Throttle(interval)(self._update_currently)
    self.update_minutely = Throttle(interval)(self._update_minutely)
    self.update_hourly = Throttle(interval)(self._update_hourly)
    self.update_daily = Throttle(interval)(self._update_daily)
