'Initialize the data object.'

def __init__(self, hass, api_key, pws_id, lang, latitude, longitude):

    self._hass = hass
    self._api_key = api_key
    self._pws_id = pws_id
    self._lang = 'lang:{}'.format(lang)
    self._latitude = latitude
    self._longitude = longitude
    self._features = set()
    self.data = None
